A somewhat literary or formal noun for bravery. In everyday speech, 勇気 is more common.
See also: 勇気
彼の勇には感服した。
I admired his bravery.
勇を奮って敵に立ち向かった。
He summoned his courage and faced the enemy.
蛮勇 describes reckless, foolhardy bravery with a negative nuance, while 勇 is neutral or positive courage.
卑怯 means cowardly or underhanded, the opposite of the courage described by 勇.
courage; bravery; nerve
hero; brave person; man of valor
brave; courageous; valiant
brave warrior; hero; brave man
encouragement; giving courage
heroism; loyalty and courage; public-spirited bravery
brave figure; heroic figure
voluntary retirement; stepping down to make way for others
foolhardiness; reckless courage; brute courage
The kanji 勇 depicts strength and movement, originally associated with martial bravery. The reading ゆう is the on'yomi.
encourage; cheer up; give courage
gallantry; chivalry
bravery; prowess; valor
chivalry; bravery
sound health; robust health; vigorous
brave soldier; brave warrior
courage; bravery; valor
fame for bravery; great renown
ambitious undertaking; bold plan
heroic; brave; majestic; soul-stirring
valiant man; brave man