expression, noun which may take the genitive case particle 'no'
unbeatable; invincible; irresistible
Idiomatic expression meaning that nothing can stand in one's way; used to describe a person, team, or force that is overwhelmingly strong or unstoppable. Often used in sports, competition, or hyperbolic praise.
彼は今シーズン、向かうところ敵なしの強さだ。
He is unbeatable this season.
このチームは向かうところ敵なしで、連勝記録を伸ばしている。
This team is invincible, extending their winning streak.
無敵 is a more concise, standard word for 'invincible' or 'unrivaled'. 向かうところ敵なし is a longer, more emphatic idiomatic expression with a similar meaning.
天下無双 means 'unparalleled under heaven' and is more literary and hyperbolic. 向かうところ敵なし is more colloquial and directly describes an unstoppable force.
Literally 'wherever one goes, there is no enemy'. A set phrase combining 向かう (to face, to go toward), ところ (place), 敵 (enemy), and なし (there is no). The exact origin is uncertain, but it follows a common pattern of idiomatic expressions describing invincibility.