torment (v.)youdaoicibaDictYouDict
c. 1300, "inflict torture on, distress," from Old French tormenter "torture, torment, oppress, agitate" (12c.), from Medieval Latin tormentare "to torment, to twist," from Latin tormentum (see torment (n.)). Related: Tormented; tormenting.
tormentor (n.)youdaoicibaDictYouDict
c. 1300, from Anglo-French tormentour, Old French tormenteor "torturer," agent noun from tormenter "to torture" (see torment (v.)).