Synonyms: start, startle, jump
Definition: a sudden involuntary movement
Usage: he awoke with a start
Similar words: unconditioned reflex, inborn reflex, innate reflex, instinctive reflex, physiological reaction, reflex, reflex action, reflex response
Definition: an automatic instinctive unlearned reaction to a stimulus
Synonyms: startle, galvanise, galvanize
Definition: to stimulate to action
Usage: ..startled him awake; galvanized into action
Similar words: blow out of the water, ball over, shock, floor, take aback
Definition: surprise greatly; knock someone's socks off
Usage: I was floored when I heard that I was promoted
Synonyms: jump, start, startle
Definition: move or jump suddenly, as if in surprise or alarm
Usage: She startled when I walked into the room
Similar words: move
Definition: move so as to change position, perform a nontranslational motion
Usage: He moved his hand slightly to the right