to disturb or agitate suddenly as by surprise or alarm.

to cause to start involuntarily, by or as by a sudden shock.

to start involuntarily, as from a shock of surprise or alarm.

a sudden shock of surprise, alarm, or the like.

something that startles.

verb

calm , comfort , compose , expect

verb

affright , agitate , alarm , amaze , astonish , astound , awe , bolt , consternate , floor , fright , give a turn , jump , make jump , rock , scare , scare to death , shake up , shock , spook , spring , spring something on , stagger , start , stun , take aback , terrify , terrorize , electrify , jolt , panic , scarify , excite , frighten , rouse , surprise , upset

noun

bolt , start