noun
intrepid spirit; brave heart
A somewhat literary or formal noun describing a courageous, fearless mindset. Often used in contexts of martial arts, bushido, or resolute determination.
彼は勇猛心を持って戦いに臨んだ。
He faced the battle with an intrepid spirit.
勇気 is the common word for 'courage' in everyday situations. 勇猛心 is more intense and literary, emphasizing a fierce, warrior-like bravery.
Compound of 勇猛 (brave, fierce) and 心 (heart, spirit). The exact historical derivation is uncertain, but the word follows a common Sino-Japanese pattern for abstract qualities.