勇気

courage: 恐怖・不安・危険などに屈さず, 信念や責務に従って行動する勇気を表す

bravery: 危険や困難に大胆に立ち向かう行動の勇敢さを表す. courage より危機度が高い状況であることを含意する

boldness: 勇敢さよりも大胆さ・無謀さ・強引さを含意する. 時に批判的に用いられる

COURAGE, METTLE, SPIRIT, RESOLUTION, TENACITY mean mental or moral strength to resist opposition, danger, or hardship.

COURAGE implies firmness of mind and will in the face of danger or extreme difficulty.

e.g. the courage to support unpopular causes

METTLE suggests an ingrained capacity for meeting strain or difficulty with fortitude and resilience.

e.g. a challenge that will test your mettle

SPIRIT also suggests a quality of temperament enabling one to hold one's own or keep up one's morale when opposed or threatened.

e.g. her spirit was unbroken by failure

RESOLUTION stresses firm determination to achieve one's ends.

e.g. the resolution of pioneer women

TENACITY adds to RESOLUTION implications of stubborn persistence and unwillingness to admit defeat.

e.g. held to their beliefs with great tenacity

source: [【GIF画像】アニメ・ジョジョの奇妙な冒険　ジョナサン・ジョースター　波紋｜無料GIF画像検索 GIFMAGAZINE 32953]

the ability to do something that frightens one:

(危険などに立ち向かう)勇気, 度胸(→ bravery)

e.g. she called on all her courage to face the ordeal.

strength in the face of pain or grief:

(苦痛などに耐える)精神力(↔ cowardice)

e.g. he fought his illness with great courage.

act on one's beliefs despite danger or disapproval.

make an effort to do something that frightens one.

nerve oneself to do something that frightens one.

Middle English (denoting the heart, as the seat of feelings): from Old French corage, from Latin cor ‘heart’.