SURRENDER, submit, capitulate, give in/up, yield, give way, succumb, climb down, back down, admit defeat, lay down one's arms, throw in the towel/sponge; informal quit, raise the white flag.
2192; headword
KNUCKLE UNDER
Meaning of KNUCKLE UNDER in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012