A somewhat literary or formal term for a courageous woman, often used in historical or dramatic contexts.
彼女は戦場で負傷者を救った勇婦として知られている。
She is known as a brave woman who rescued the wounded on the battlefield.
Compound of 勇 (bravery) and 婦 (woman). The exact historical derivation is uncertain, but the kanji combination directly conveys the meaning.