overmatched

/ˌoʊvərˈmætʃt/
adjective
  1. Outclassed or defeated because the opponent or challenge is too strong.
    • The young boxer felt overmatched against the seasoned professional.
    • The small startup was overmatched by the giant corporation's resources.
    • In the debate, she was clearly overmatched by her opponent's knowledge.
Antonyms