IPA: //ˈpraɪzˌwɪnər//
KK: /ˈpraɪzˌwɪnər/
A person who has won a prize in a competition or contest.
She was named the prizewinner of the art competition.
Prizewinner → It is formed from "prize" (from Old French *pris*, meaning something captured or taken) and "winner" (from Old English *winnan*, meaning to strive or struggle). The word "prizewinner" refers to a person who has strived and succeeded in capturing or winning a prize.
Think of someone who has 'strived' ('winnan') to 'capture' or 'take' ('pris') something valuable — that's why a prizewinner is someone who wins a prize.