FRIGHTEN

v. terrify, scare, alarm, panic, startle, shock, petrify, horrify, dismay, appal or US appall, unnerve, distress, daunt, cow, intimidate, Colloq scare out of one's wits, make one's hair stand on end, scare the (living) daylights [etc.] out of, scare stiff, Brit put the wind up (someone), put the frighteners on (someone) She was frightened by the neighbours' vicious dog Are you frightened of aeroplanes?