prevention (n.)

mid-15c., prevencioun, "action of stopping an event or practice," from Medieval Latin preventionem (nominative preventio) "action of anticipating; a going before," noun of action from past-participle stem of Latin praevenire "come or go before, anticipate" (see prevent). Original sense in English now is obsolete; the meaning "act of hindering or rendering impossible by previous measures" is from 1660s.