retch

Noun

• an involuntary spasm of ineffectual vomiting
  • a bad case of the heaves
    

Verb

• make an unsuccessful effort to vomit; strain to vomit

• 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
    

Related words

• Synonyms: 
  heave , gag , vomit , vomit up , purge , cast , sick , cat , be sick , disgorge , regorge , puke , barf , spew