"retching" in the verb sense
1. vomit, vomit up, purge, cast, sick, cat, be sick, disgorge, regorge, retch, puke, barf, spew, spue, chuck, upchuck, honk, regurgitate, throw up
eject the contents of the stomach through the mouth
"After drinking too much, the students vomited"
"He purged continuously"
"The patient regurgitated the food we gave him last night"
2. gag, heave, retch
make an unsuccessful effort to vomit strain to vomit
Source: WordNet® (An amazing lexical database of English)
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