Retching

v. try to vomit, make an unsuccessful effort to heave; vomit, heave

Retching is a process in the human body where gastric (and sometimes duodenal) contents are forced into the esophagus, but do not enter the pharynx. Retching usually precedes vomiting, when the upper esophageal sphincter remains closed. If the upper esophageal sphincter is open, vomiting occurs. .
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Retching /retch·ing/ strong involuntary effort to vomit. retching an unproductive effort to vomit. [more]Retching - Community and Resources

Noun
1. an involuntary spasm of ineffectual vomiting; "a bad case of the heaves"
(synonym) heave
(hypernym) spasm
(derivation) vomit, vomit up, purge, cast, sick, cat, be sick, disgorge, regorge, puke, barf, spew, spue, chuck, upchuck, honk, regurgitate, throw up
Verb
1. 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"
(synonym) vomit, vomit up, purge, cast, sick, cat, be sick, disgorge, regorge, puke, barf, spew, spue, chuck, upchuck, honk, regurgitate, throw up
(hypernym) excrete, egest, eliminate, pass
(derivation) heave
2. make an unsuccessful effort to vomit; strain to vomit
(synonym) gag, heave
(derivation) heave

(p. pr. & vb. n.)
of Retch