勇ましい|いさましいisamashii[4]nakadaka (mid-high)

1. i-adjectivebrave; valiant; gallant; courageous
   一人ひとりで原始林げんしりんへ乗り込のりこもうとは君きみはなんて勇いさましいんだ。↗

   How brave of you to go alone into the primaeval forest!
2. i-adjectivestirring; vigorous; rousing

• Synonym勇敢ゆうかんNeutralNeutral. Bravery as a character trait (「勇敢な消防士」); 「勇ましい」 can also describe stirring, rousing scenes.
• Synonym勇猛ゆうもうWrittenWritten/formal prose. Valiant and fearless (「勇猛な戦士」); used mostly of fighting.
• Synonym果敢かかんNeutralNeutral. Resolute and daring (「果敢に挑む」); stresses decisiveness.
• Synonym壮烈そうれつWrittenWritten/formal prose. Grandly heroic (「壮烈な最期」); used mostly of heroic death or sacrifice.
• Synonym勇壮ゆうそうNeutralNeutral. Majestic and stirring (「勇壮な祭り」); mostly of scenes and music.
• Synonym雄々しいおおしいWrittenWritten/formal prose. Manly, heroic bravery (「雄々しく戦う」); carries a masculine image.
• Related大胆だいたんNeutralNeutral. Bold (「大胆な発想」); does not necessarily imply courage — covers daring ideas and actions.
• Related健気けなげNeutralNeutral. A weak or young person bravely striving, worthy of praise (「健気な子」); said with affection.
• Related不敵ふてきNeutralNeutral. Fearless, as in 「不敵な笑み」; often carries a defiant, haughty tinge.
• Related果断かだんWrittenWritten/formal prose. Decisive (「果断な処置」); stresses swift decision-making.
• Related壮絶そうぜつNeutralNeutral. Intense and dramatic (「壮絶な戦い」); extreme in degree, not necessarily brave.
• Related剛勇ごうゆうWrittenWritten/formal prose. Strong, valiant bravery; rare.
• Related勇烈ゆうれつWrittenWritten/formal prose. Valiant and fierce; rare.
• Related豪胆ごうたんWrittenWritten/formal prose. Great nerve, unshaken in a crisis (「豪胆な人物」).
• Related大胆不敵だいたんふてきNeutralNeutral. Four-character compound for audacious fearlessness (「大胆不敵な犯行」); often derogatory.
• Related向こう見ずむこうみずNeutralNeutral. Reckless, heedless of consequences (「向こう見ずな行動」); negative tinge.
• Related勇邁ゆうまいWrittenWritten/formal prose. Heroic and gallant; rare.
• Related凛々しいりりしいNeutralNeutral. Dashing and dignified (「凛々しい顔立ち」); stresses appearance and bearing.
• Related豪猛ごうもうWrittenWritten/formal prose. Fierce and powerful; rare.
• Related野太いのぶといNeutralNeutral. Bold and shameless, or (of a voice) deep and rough (「野太い声」).
• Related冒険的ぼうけんてきNeutralNeutral. Adventurous, risky (「冒険的な試み」); stresses daring to try the uncertain.
• Related勇武ゆうぶWrittenWritten/formal prose. Valiant and skilled in the martial arts; rare.
• Antonym臆病おくびょうNeutralNeutral. Timid, easily frightened; the direct opposite of 「勇ましい」.
• Antonym弱々しいよわよわしいNeutralNeutral. Weak and feeble (「弱々しい声」); the opposite of 「勇ましい」.
• Antonym卑怯ひきょうNeutralNeutral. Cowardly, or mean and underhanded; the opposite of 「勇ましい」 only in its cowardly sense.

「勇ましい」 is the default for bravery and for something stirring and vigorous (「勇ましい行進曲」). For bravery as a character trait say 「勇敢」, for daring 「大胆」, for a dashing appearance 「凛々しい」, and for majestic scenes 「勇壮」. The opposite is 「臆病」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 危険きけんや困難こんなんを恐おそれずに向むかっていくさま
2. 大胆だいたんで活発かっぱつなさま。
3. 人ひとを奮い立ふるいたたせるさま。