English Synonyms for Confidence and Optimism Vocabulary Words – Online Quiz!

affirm (verb) /əˈfɜrm/
Meaning: When we affirm, we are expressing our agreement, support, or belief in a particular statement, idea, or concept.
Find the synonym: Which option is closest in meaning to affirm?
Options: assert; deny; contradict; refute
Answer: assert
Synonyms: assert; avow; confirm; declare; endorse; maintain; ratify; state; uphold; validate; verify
Example: "She will affirm her commitment to the project."

alacrity (noun) /əˈlakrɪti/
Meaning: When someone acts with alacrity, they do so with enthusiasm and a sense of readiness, often displaying a quick and efficient response to challenges or opportunities.
Find the synonym: Which option is closest in meaning to alacrity?
Options: eagerness; reluctance; apathy; hesitation
Answer: eagerness
Synonyms: ardor; avidity; briskness; eagerness; enthusiasm; fervor; keenness; liveliness; readiness; zeal
Example: "She accepted the challenge with alacrity."

assertion (noun) /əˈsəːʃ(ə)n/
Meaning: It is a declaration of something as being true or factual, that is made by someone who is trying to establish or assert their position or belief.
Find the synonym: Which option is closest in meaning to assertion?
Options: declaration; denial; contradiction; refutation
Answer: declaration
Synonyms: affirmation; allegation; attestation; avowal; claim; contention; declaration; insistence; proclamation; pronouncement; statement
Example: "Her confident assertion caught the attention of the entire audience."

assertive (adjective) /əˈsəːtɪv/
Meaning: An assertive person is able to clearly express their thoughts, feelings, and opinions in a direct and confident manner, and is not afraid to advocate for their own needs and wants.
Find the synonym: Which option is closest in meaning to assertive?
Options: confident; timid; submissive; passive
Answer: confident
Synonyms: bold; decided; decisive; direct; emphatic; firm; forceful; forward; insistent; positive
Example: "Her assertive demeanor commanded respect in the boardroom."

assurance (noun) /əˈʃʊər əns/
Meaning: It denotes a feeling of trust or reassurance in the reliability, truth, or effectiveness of a person, thing, or situation.
Find the synonym: Which option is closest in meaning to assurance?
Options: confidence; doubt; uncertainty; insecurity
Answer: confidence
Synonyms: certainty; confidence; conviction; faith; guarantee; pledge; promise; security; surety; trust; warranty
Example: "The warranty provided an assurance that the product would be repaired or replaced if necessary."

audacious (adjective) /ɔˈdeɪ ʃəs/
Meaning: An audacious individual exhibits a courageous and confident demeanor, unafraid to venture into unfamiliar territory or tackle difficult tasks.
Find the synonym: Which option is closest in meaning to audacious?
Options: bold; timid; cautious; fearful
Answer: bold
Synonyms: bold; brave; courageous; daring; dauntless; enterprising; fearless; gutsy; intrepid; plucky; valiant; venturesome
Example: "The audacious colors of the painting filled the room with a unique vibrancy."

audacity (noun) /ɔːˈdasɪti/
Meaning: It can be used to describe a person who is confident and fearless, especially in the face of danger or opposition.
Find the synonym: Which option is closest in meaning to audacity?
Options: boldness; timidity; cowardice; caution
Answer: boldness
Synonyms: arrogance; brashness; brazenness; cheek; cockiness; forwardness; gall; nerve; temerity
Example: "Her audacity in challenging the status quo was both inspiring and unsettling."

aver (verb) /əˈvɜr/
Meaning: When someone avers a statement or belief, they are making a claim or declaration, usually emphasizing their certainty or conviction.
Find the synonym: Which option is closest in meaning to aver?
Options: assert; deny; contradict; disavow
Answer: assert
Synonyms: affirm; argue; assert; claim; contend; declare; insist; maintain; proclaim; profess; purport; state
Example: "The expert will aver that the product meets all safety standards."

bold (adjective) /boʊld/
Meaning: It signifies a willingness to take risks or tackle challenges without hesitation.
Find the synonym: Which option is closest in meaning to bold?
Options: brave; timid; cowardly; fearful
Answer: brave
Synonyms: adventurous; assertive; audacious; brave; confident; courageous; daring; dauntless; fearless; gallant; intrepid; plucky
Example: "The artist used bold strokes of color to create a captivating painting."

brashness (noun) /ˈbræʃ nɪs/
Meaning: Brashness is often associated with a confident and assertive demeanor, but with a tendency to act or speak in a manner that is perceived as excessive, audacious, or even reckless.
Find the synonym: Which option is closest in meaning to brashness?
Options: audacity; caution; prudence; discretion
Answer: audacity
Synonyms: assertiveness; audacity; boldness; cheekiness; confidence; gall; impertinence; impetuousness; impudence; rashness; recklessness; temerity
Example: "His brashness often led him to speak without considering the consequences."

bravado (noun) /brəˈvɑːdəʊ/
Meaning: It is characterized by a show of courage, defiance, or audacity, and may be accompanied by a lack of genuine fear or concern.
Find the synonym: Which option is closest in meaning to bravado?
Options: bravado; timidity; meekness; cowardice
Answer: bravado
Synonyms: arrogance; audacity; bluster; boastfulness; boasting; boldness; bravura; cockiness; confidence; egotism; showiness; showmanship
Example: "His bravado wowed the crowd, but inside, doubt gnawed at his confidence."

brazen (adjective) /ˈbreɪz(ə)n/
Meaning: Brazen refers to an attitude or behavior that is bold, daring, or impertinent, often in a way that is considered impudent or disrespectful.
Find the synonym: Which option is closest in meaning to brazen?
Options: bold; shy; timid; modest
Answer: bold
Synonyms: audacious; barefaced; brash; defiant; forward; impudent; shameless; unabashed; unashamed
Example: "Her brazen attitude made her a formidable leader."

charm (noun) /tʃɑrm/
Meaning: It signifies the ability to captivate or enchant others through one's personality or behavior.
Find the synonym: Which option is closest in meaning to charm?
Options: appeal; dullness; unattractiveness; repulsiveness
Answer: appeal
Synonyms: allure; amulet; appeal; attraction; charisma; enchantment; fascination; glamour; magic; magnetism; spell; talisman
Example: "She wore a silver charm bracelet that jingled softly as she walked."

charming (adjective) /ˈtʃɑːmɪŋ/
Meaning: It refers to a quality that captures the imagination and wins the hearts of others.
Find the synonym: Which option is closest in meaning to charming?
Options: delightful; repulsive; unappealing; disagreeable
Answer: delightful
Synonyms: appealing; captivating; charismatic; delightful; enchanting; engaging; fetching; lovely; pleasant
Example: "The city is charming with its narrow streets and old buildings."

cheek (noun) /tʃik/
Meaning: In this sense, 'cheek' represents a form of effrontery or brashness that disregards social norms or boundaries.
Find the synonym: Which option is closest in meaning to cheek?
Options: audacity; timidity; shyness; respectfulness
Answer: audacity
Synonyms: audacity; boldness; brass; chutzpah; gall; impertinence; impudence; insolence; nerve; presumption; sauciness; temerity
Example: "He had the cheek to ask for a raise after only a month on the job."

chutzpah (noun) /ˈʧʌtˌspɑ/
Meaning: It is a noun that refers to the quality or characteristic of being audacious, particularly in situations where one is not entitled to such boldness or where it is socially inappropriate.
Find the synonym: Which option is closest in meaning to chutzpah?
Options: boldness; timidity; meekness; cowardice
Answer: boldness
Synonyms: audacity; boldness; brass; bravado; cheek; cheekiness; daring; effrontery; gall; guts; impudence; nerve
Example: "Her chutzpah in asking for a raise impressed her boss."

cocksure (adjective) /kɒkʃʊəʳ/
Meaning: It denotes a person who displays unwavering certainty, often bordering on arrogance or an inflated sense of self-importance.
Find the synonym: Which option is closest in meaning to cocksure?
Options: overconfident; uncertain; doubtful; unsure
Answer: overconfident
Synonyms: arrogant; audacious; bold; brash; certain; confident; overconfident; presumptuous; smug; sure
Example: "He strutted around the office, acting cocksure and invincible."

complacent (adjective) /kəmˈpleɪs(ə)nt/
Meaning: It can also describe a person who is unconcerned or unaware of potential problems or dangers.
Find the synonym: Which option is closest in meaning to complacent?
Options: self-satisfied; dissatisfied; discontented; ambitious
Answer: self-satisfied
Synonyms: careless; casual; conceited; content; contented; detached; indifferent; insouciant; nonchalant; perfunctory; satisfied; smug
Example: "He became complacent in his job and stopped putting in effort."

confidence (noun) /kɒnfɪdəns/
Meaning: It encompasses a sense of self-assurance and trust in one's judgments and capabilities.
Find the synonym: Which option is closest in meaning to confidence?
Options: assurance; doubt; insecurity; uncertainty
Answer: assurance
Synonyms: assurance; belief; certainty; conviction; courage; faith; optimism; poise; sureness; trust
Example: "She spoke with confidence, knowing that her ideas were valuable and worthy of being heard."

confident (adjective) /ˈkɒn fɪ dənt/
Meaning: Confident, as an adjective, describes a person's state of When someone is confident, they display a strong sense of trust in their own skills, knowledge, and judgments.
Find the synonym: Which option is closest in meaning to confident?
Options: assured; doubtful; insecure; uncertain
Answer: assured
Synonyms: assertive; assured; bold; brave; certain; decisive; fearless; optimistic; poised; secure; sure
Example: "The confident young woman walked into the room, head held high, ready to tackle any challenge that came her way."

conviction (noun) /kənˈvɪkʃᵊn/
Meaning: It often implies a deep sense of personal conviction or moral certainty, and can be shaped by a variety of factors such as personal experience, cultural background, or education.
Find the synonym: Which option is closest in meaning to conviction?
Options: belief; doubt; uncertainty; indecision
Answer: belief
Synonyms: assurance; certainty; confidence; dogma; faith; ideology; persuasion; principle; tenet
Example: "Her strong conviction in human rights led her to become an activist."

debonair (adjective) /ˌdɛbəˈnɛː/
Meaning: When we refer to an individual as debonair, we are highlighting their poised and charismatic presence, which exudes a sense of style and confidence.
Find the synonym: Which option is closest in meaning to debonair?
Options: suave; ungainly; awkward; clumsy
Answer: suave
Synonyms: charming; courteous; dashing; elegant; fashionable; refined; smooth; suave; urbane
Example: "He walked into the room with a debonair air, turning heads."

diffident (adjective) /ˈdɪfɪd(ə)nt/
Meaning: It can describe a person who is shy, self-doubting, or hesitant to speak up or assert themselves.
Find the synonym: Which option is closest in meaning to diffident?
Options: shy; confident; assertive; bold
Answer: shy
Synonyms: constrained; meek; reluctant; reserved; shy; timid; unassertive; unassuming; withdrawn
Example: "She gave a diffident smile, unsure of how her joke would be received."

embolden (verb) /ɪmˈbəʊld(ə)n/
Meaning: It is the act of making someone feel more courageous, confident, or determined.
Find the synonym: Which option is closest in meaning to embolden?
Options: encourage; discourage; dishearten; deter
Answer: encourage
Synonyms: encourage; hearten; inspire; invigorate; reassure; reinforce; rouse; stimulate; vitalize
Example: "The successful fundraiser will embolden the community to plan more events."

empowerment (noun) /ɪmˈpaʊəmənt/
Meaning: It involves providing people with the tools, resources, and opportunities they need to become self-sufficient and independent.
Find the synonym: Which option is closest in meaning to empowerment?
Options: authorization; oppression; subjugation; dependence
Answer: authorization
Synonyms: agency; authorization; autonomy; determination; emancipation; enablement; enfranchisement; fulfillment; governance; independence; liberation; mastery
Example: "The organization's mission is to promote the empowerment of marginalized communities."

encourage (verb) /ɛnˈkɜr ɪdʒ/
Meaning: It involves using words, actions, or gestures to uplift and bolster someone's spirit, reinforcing their determination, and fostering a positive mindset.
Find the synonym: Which option is closest in meaning to encourage?
Options: motivate; discourage; dishearten; deter
Answer: motivate
Synonyms: boost; embolden; empower; foster; inspire; invigorate; motivate; rally; spur; stimulate; support; uplift
Example: "Self-help books often encourage readers to adopt positive habits."

encouragement (noun) /ɛnˈkɜr ɪdʒ mənt/
Meaning: It encompasses a range of positive actions, such as offering words of praise, expressing belief in someone's abilities, or providing assistance and guidance during challenging times.
Find the synonym: Which option is closest in meaning to encouragement?
Options: support; discouragement; obstruction; demotivation
Answer: support
Synonyms: applause; approval; backing; boost; empowerment; inspiration; morale; motivation; reassurance; reinforcement; support; upliftment
Example: "Her words of encouragement gave me the confidence to pursue my dreams."

encouraging (adjective) /ɪnˈkʌrɪʤɪŋ/
Meaning: It represents the act of offering words, actions, or situations that uplift and positively influence others.
Find the synonym: Which option is closest in meaning to encouraging?
Options: inspiring; disheartening; discouraging; demotivating
Answer: inspiring
Synonyms: cheering; emboldening; empowering; heartening; inspiring; invigorating; motivating; positive; reassuring; stimulating; supportive; uplifting
Example: "She received an encouraging email from her professor, praising her hard work and dedication."

falter (verb) /ˈfɔltər/
Meaning: When someone falters, they experience a temporary interruption or uncertainty in their progress, often due to doubt, fear, or a lack of determination.
Find the synonym: Which option is closest in meaning to falter?
Options: hesitate; persevere; continue; persist
Answer: hesitate
Synonyms: delay; flounder; halt; pause; stagger; stammer; totter; tremble; tumble; vacillate; wait; wobble
Example: "She doesn't falter in the face of challenges; instead, she thrives."

forwardness (noun) /ˈfɔr wərd nɪs/
Meaning: It denotes a tendency to take the initiative, express oneself openly, or show a willingness to speak up or act without hesitation.
Find the synonym: Which option is closest in meaning to forwardness?
Options: assertiveness; timidity; shyness; reserve
Answer: assertiveness
Synonyms: assertiveness; audacity; boldness; confidence; daring; eagerness; impetuosity; initiative; outspokenness; pushiness; readiness; vigor
Example: "Her forwardness in expressing her opinions sometimes rubbed people the wrong way."

gumption (noun) /ˈgʌmp ʃən/
Meaning: It encompasses a person's ability to take action, make bold decisions, and persevere in the face of challenges.
Find the synonym: Which option is closest in meaning to gumption?
Options: resourcefulness; apathy; laziness; ineptitude
Answer: resourcefulness
Synonyms: ambition; boldness; courage; determination; drive; fortitude; initiative; motivation; perseverance; resilience; resourcefulness; tenacity
Example: "Despite facing numerous rejections, she applied to every job opening with gumption."

heartening (adjective) /ˈhɑːtənɪŋ/
Meaning: It refers to actions, events, or words that have a positive and inspiring effect, renewing one's faith, confidence, or motivation.
Find the synonym: Which option is closest in meaning to heartening?
Options: uplifting; discouraging; disheartening; demoralizing
Answer: uplifting
Synonyms: cheering; comforting; encouraging; enlivening; gratifying; hopeful; inspiring; invigorating; motivating; promising; reassuring; uplifting
Example: "The teacher's words of encouragement were incredibly heartening to the struggling student."

hopeful (adjective) /ˈhoʊp fəl/
Meaning: When someone is hopeful, they possess a sense of anticipation and expectation that things will improve or turn out well.
Find the synonym: Which option is closest in meaning to hopeful?
Options: optimistic; pessimistic; hopeless; despairing
Answer: optimistic
Synonyms: aspiring; bright; buoyant; confident; encouraged; enthusiastic; expectant; optimistic; positive; promising; sanguine; upbeat
Example: "Despite the setbacks, she remained hopeful that her dreams would come true."

indomitable (adjective) /ɪnˈdɒmɪtəbl/
Meaning: When something or someone is described as indomitable, it signifies an unwavering and relentless determination to persevere and overcome obstacles, no matter how formidable they may appear.
Find the synonym: Which option is closest in meaning to indomitable?
Options: unyielding; weak; timid; surrendering
Answer: unyielding
Synonyms: determined; invincible; invulnerable; relentless; resolute; unassailable; unbeatable; unconquerable; undefeatable; unflinching; unstoppable; unwavering
Example: "Jane's indomitable spirit propelled her through the grueling marathon."

infallible (adjective) /ɪnˈfalɪbl/
Meaning: When we characterize something as infallible, it suggests a level of perfection and reliability that is beyond doubt or criticism.
Find the synonym: Which option is closest in meaning to infallible?
Options: flawless; fallible; imperfect; error-prone
Answer: flawless
Synonyms: accurate; faultless; flawless; impeccable; meticulous; perfect; precise; scrupulous; unerring
Example: "Recent events have shown that experts are far from infallible."

insecure (adjective) /ˌɪn sɪˈkyʊər/
Meaning: When applied to a person, it suggests a sense of self-doubt, anxiety, or vulnerability.
Find the synonym: Which option is closest in meaning to insecure?
Options: uncertain; confident; secure; assured
Answer: uncertain
Synonyms: anxious; apprehensive; doubtful; fragile; hesitant; nervous; timid; uncertain; unconfident; unsure; vulnerable
Example: "Sarah felt insecure about her presentation, fearing she might stumble during the important meeting."

intrepid (adjective) /ɪnˈtrɛpɪd/
Meaning: It is an adjective that describes a person who is bold and determined, who is not easily discouraged or deterred by obstacles or challenges.
Find the synonym: Which option is closest in meaning to intrepid?
Options: brave; timid; cowardly; fearful
Answer: brave
Synonyms: adventurous; audacious; bold; courageous; daring; gallant; heroic; plucky; resolute; valiant
Example: "The intrepid explorer ventured into the uncharted jungle."

invincible (adjective) /ɪnˈvɪn sə bəl/
Meaning: It implies a state of indomitable strength and resilience, showcasing an unbeatable or unassailable nature.
Find the synonym: Which option is closest in meaning to invincible?
Options: unbeatable; vulnerable; defeatable; weak
Answer: unbeatable
Synonyms: bulletproof; impregnable; indefatigable; indomitable; indubitable; infallible; resolute; unassailable; unbeatable; unconquerable; unstoppable; unyielding
Example: "The superhero appeared invincible as he effortlessly thwarted all of his enemies' attacks."

jaunty (adjective) /ˈdʒɔːnti/
Meaning: When we refer to an individual or an object as jaunty, we are emphasizing their spirited and upbeat demeanor, which may manifest in a confident and often casual way of carrying themselves.
Find the synonym: Which option is closest in meaning to jaunty?
Options: cheerful; somber; depressed; joyless
Answer: cheerful
Synonyms: buoyant; cheerful; energetic; jovial; perky; playful; sparky; spirited; sprightly; vivacious
Example: "He walked into the room with a jaunty stride, exuding confidence."

optimist (noun) /ˈɒp tə mɪst/
Meaning: Optimists tend to see the world through a lens of possibilities, emphasizing the potential for favorable outcomes even in challenging situations.
Find the synonym: Which option is closest in meaning to optimist?
Options: hopeful; pessimist; cynic; realist
Answer: hopeful
Synonyms: believer; buoyant; dreamer; enthusiast; hopeful; hoper; idealist; positivist; romantic; sanguine; upbeat; visionary
Example: "The optimist greeted each day with a smile, believing it held endless possibilities."

optimistic (adjective) /ˌɒp təˈmɪs tɪk/
Meaning: When someone is optimistic, they tend to anticipate favorable outcomes, believing that things will generally work out for the best.
Find the synonym: Which option is closest in meaning to optimistic?
Options: hopeful; pessimistic; bleak; despairing
Answer: hopeful
Synonyms: assured; bright; buoyant; cheery; confident; enthusiastic; hopeful; idealistic; positive; promising; sunny; upbeat
Example: "The optimistic weather forecast predicted a sunny day ahead."

plucky (adjective) /ˈplʌki/
Meaning: When we characterize an individual as plucky, we highlight their spirited and tenacious attitude, emphasizing their willingness to confront obstacles with bravery and a can-do spirit.
Find the synonym: Which option is closest in meaning to plucky?
Options: courageous; cowardly; timid; faint-hearted
Answer: courageous
Synonyms: bold; courageous; daring; feisty; gritty; gutsy; intrepid; spirited; undaunted; unflinching
Example: "The plucky young girl stood up to the bully with unwavering courage."

positive (adjective) /ˈpɒz ɪ tɪv/
Meaning: It denotes a quality or attribute that is beneficial, desirable, or affirmative in its impact or implications.
Find the synonym: Which option is closest in meaning to positive?
Options: optimistic; negative; pessimistic; cynical
Answer: optimistic
Synonyms: advantageous; affirmative; beneficial; buoyant; constructive; encouraging; favorable; good; hopeful; optimistic; promising; uplifting
Example: "She always maintains a positive attitude, even in the face of adversity."

pusillanimous (adjective) /ˌpjuːsɪˈlanɪməs/
Meaning: It can also refer to a person who is easily intimidated or frightened.
Find the synonym: Which option is closest in meaning to pusillanimous?
Options: cowardly; brave; courageous; bold
Answer: cowardly
Synonyms: cowardly; craven; fearful; gutless; irresolute; shrinking; spineless; timid; timorous; wimpy
Example: "His pusillanimous behavior in the face of adversity disappointed everyone."

sanguine (adjective) /ˈsaŋɡwɪn/
Meaning: When we characterize an individual as sanguine, we are highlighting their hopeful and positive outlook on life, which is marked by a belief in favorable outcomes and an ability to maintain a good mood even when faced with difficulties.
Find the synonym: Which option is closest in meaning to sanguine?
Options: optimistic; pessimistic; despondent; bleak
Answer: optimistic
Synonyms: assured; bright; bullish; buoyant; cheerful; confident; enthusiastic; hopeful; upbeat
Example: "She is remarkably sanguine about her employment prospects."

spirited (adjective) /ˈspɪr ɪ tɪd/
Meaning: It conveys a sense of vigor, vitality, and a vibrant demeanor.
Find the synonym: Which option is closest in meaning to spirited?
Options: lively; lethargic; listless; apathetic
Answer: lively
Synonyms: animated; buoyant; dynamic; effervescent; energetic; enthusiastic; exuberant; fiery; lively; vibrant; vivacious; zealous
Example: "The spirited horse galloped freely across the open field."

unabashed (adjective) /ʌnəˈbaʃt/
Meaning: It suggests a lack of self-consciousness or a sense of freedom from shame or guilt.
Find the synonym: Which option is closest in meaning to unabashed?
Options: bold; ashamed; embarrassed; diffident
Answer: bold
Synonyms: assured; audacious; bold; brazen; confident; fearless; shameless; unapologetic; unashamed; unblushing; unconcerned; undaunted
Example: "She delivered an unabashed speech, boldly addressing the controversial topic."

unassailable (adjective) /ʌnəˈseɪləb(ə)l/
Meaning: When we characterize an idea, position, or fortress as unassailable, we emphasize its indomitable strength and the impossibility of successfully opposing it.
Find the synonym: Which option is closest in meaning to unassailable?
Options: invincible; vulnerable; weak; attackable
Answer: invincible
Synonyms: impervious; impregnable; inarguable; incontestable; incontrovertible; indisputable; invincible; invulnerable; irrefutable; unchallengeable; undeniable; untouchable
Example: "Freedom of movement is one of the European Union's unassailable conditions of membership."

unquestionable (adjective) /ʌnˈkwɛstʃənəbl/
Meaning: It is often used to describe facts, evidence, or beliefs that are so clear and convincing that they do not require any further explanation or justification.
Find the synonym: Which option is closest in meaning to unquestionable?
Options: indisputable; debatable; doubtful; uncertain
Answer: indisputable
Synonyms: absolute; certain; clear; conclusive; definite; evident; inarguable; incontestable; incontrovertible; indisputable; irrefutable; obvious
Example: "His dedication to his work was an unquestionable trait that everyone admired."

unshakable (adjective) /ʌnˈʃeɪkəbl/
Meaning: When we characterize something as unshakable, we emphasize its unwavering and unyielding nature, signifying that it is impervious to external forces, challenges, or uncertainties.
Find the synonym: Which option is closest in meaning to unshakable?
Options: steadfast; vacillating; unstable; wavering
Answer: steadfast
Synonyms: composed; determined; firm; immovable; imperturbable; relentless; resolute; steadfast; steady; unflappable; unflinching; unruffled
Example: "Her unshakable confidence was evident in her poised demeanor."

valiant (adjective) /ˈvalɪənt/
Meaning: When an individual is characterized as valiant, it signifies their willingness to display exceptional courage and determination in order to protect others, uphold noble principles, or face perilous circumstances.
Find the synonym: Which option is closest in meaning to valiant?
Options: heroic; cowardly; timid; faint-hearted
Answer: heroic
Synonyms: bold; courageous; dauntless; fearless; gallant; heroic; indomitable; intrepid; valorous
Example: "The valiant firefighter rushed into the burning building to save lives."