Instigate is often used as a synonym of incite (as in "hoodlums instigating violence"), but the two words differ slightly in their overall usage. Incite usually stresses an act of stirring something up that one did not necessarily initiate ("the court's decision incited riots"). Instigate implies responsibility for initiating or encouraging someone else's action and usually suggests dubious or underhanded intent ("he was charged with instigating a conspiracy"). Another similar word, foment, implies causing something by means of persistent goading ("the leader's speeches fomented a rebellion"). Deriving from the past participle of the Latin verb instigare, instigate stepped into English in the 16th century, after incite and ahead of foment.