Treating a woman decently right up to the end of your association with her is the best way to prevent relationship blowback.
The U.S. government will stop at nothing to prevent whistleblowers from revealing official secrets.
Police and firefighters are exempt from right to work due to special collective-bargaining rights that prevent strikes.
early 15c., "act in anticipation of," from Latin praeventus, past participle of praevenire "come before, anticipate, hinder," in Late Latin also "to prevent," from prae "before" (see pre-) + venire "to come" (see venue). Originally literal; sense of "anticipate to hinder" was in Latin, but not recorded in English until 1540s.