Is it ensure, insure, or assure?
late 14c., "act of expelling contents of the stomach through the mouth," from Latin vomitare "to vomit often," frequentative of vomere "spew forth, discharge," from PIE root *wem- "to spit, vomit" (cf. Greek emein "to vomit," emetikos "provoking sickness;" Sanskrit vamati "he vomits;" Avestan vam- "to spit;" Lithuanian vemiu "to vomit," Old Norse væma "seasickness"). In reference to the matter so ejected, it is attested from late 14c.
early 15c.; see vomit (n.). Related: Vomited; vomiting.
vomit vom·it (vŏm'ĭt)
v. vom·it·ed, vom·it·ing, vom·its
To eject part or all of the stomach contents through the mouth, usually in a series of involuntary spasmic movements. n.
The act or an instance of ejecting matter from the stomach through the mouth.
Matter ejected from the stomach through the mouth.