retching

动词 retch:

1. eject the contents of the stomach through the mouth
   同义词：vomit, vomit up, purge, cast, sick, cat, be sick, disgorge, regorge, retch, puke, barf, spew, spue, chuck, upchuck, honk, regurgitate, throw up
2. make an unsuccessful effort to vomit; strain to vomit
   同义词：gag, heave, retch