不ふ敗はい

noun which may take the genitive case particle 'no', noun

undefeated; unbeatable; invincible

Describes a person, team, or record that has never been defeated or is considered impossible to defeat. Often used in sports, military, and competitive contexts.

• そのチームは今こんシーズン不ふ敗はいを誇ほこっている。

  That team boasts an undefeated record this season.

• 彼かれは不ふ敗はいのチャンピオンとして知しられている。

  He is known as an unbeatable champion.