noun, noun which may take the genitive case particle 'no', na-adjective
indomitable; unyielding; persistent
Describes a spirit, will, or attitude that never gives in to hardship. Often used in formal or literary contexts, and in set phrases like 不屈の精神 (indomitable spirit).
彼の不屈の精神が、チームを勝利に導いた。
His indomitable spirit led the team to victory.
どんな困難にも不屈の意志で立
She faces any difficulty with an unyielding will.
Compound of 不 (not) and 屈 (bend, yield). The meaning 'not bending' extends metaphorically to an unyielding spirit.