regurgitation (n.) Look up regurgitation at Dictionary.com
c. 1600, from Medieval Latin regurgitationem (nominative regurgitatio), noun of action from past participle stem of regurgitare "to overflow," from re- "back" (see re-) + Late Latin gurgitare "engulf, flood" (found in Latin ingurgitare "to pour in"), from gurges "whirlpool, gorge, abyss" (see gurges).
regurgitate (v.) Look up regurgitate at Dictionary.com
1640s (intransitive), 1753 (transitive), back formation from regurgitation, or else from Medieval Latin regurgitatus, past participle of regurgitare. Meaning "to vomit" first attested 1753. Related: Regurgitated; regurgitating.