emetic

1650s (n.) "medicine that induces vomiting;" 1660s (adj.) "inducing vomiting;" from French émétique (16c.), from Latin emeticus, from Greek emetikos "causing vomiting," from emesis "vomiting," from emein "to vomit," from PIE *weme- "to spit, vomit" (see vomit (v.)).