See succumb in Webster's New World Roget's A-Z Thesaurus II
verb
To give in from or as if from a gradual loss of strength:
bow1, buckle, capitulate, submit, surrender, yield. (Informal) fold. See resistTo suddenly lose all health or strength:
break (down), cave in, collapse, crack, drop, give out. (Informal) crack up. (Slang) conk out. Idiom: give way. See healthTo cease living:
decease, demise, depart, die, drop, expire, go, pass away, pass (on), perish. (Informal) pop off. (Slang) check out, croak, kick in, kick off. Idioms: bite the dust, breathe one's last, cash in, give up the ghost, go to one's grave, kick the bucket, meet one's end (or Maker), pass on to the Great Beyond, turn up one's toes. See live
Learn more about succumb