in·vig·i·late \ə̇nˈvijəˌlāt\verb (-ed/-ing/-s) Etymology: Latin invigilatus, past participle of invigilare, from in- in- (II) + vigilare to watch — more at vigilant intransitive verb : to keep watch < that invisible power that invigilates over all things — Henry More > specificallyBritain: to proctor an examination transitive verb : to make watchful