Etymology: (1540–50; var. of reach, OE hræmacr;can to clear the throat (not recorded in ME), der. of hrāca a clearing of the throat; cf. ON hræmacr;kja to hawk, spit)
Definition of 'Retch'
Princeton's WordNet
1. (verb)heave, retch an involuntary spasm of ineffectual vomiting "a bad case of the heaves"
2. (verb)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"
Definitions of Retch 
