recoil
UK: rɪˈkɔɪl | US: rɪˈkɔɪl
vi. to suddenly move backward because of fear, pain, or shock
vi. (of a gun) to jerk backward when fired
n. the backward movement of a gun when fired
The word "recoil" originated in Middle English from Old French reculer, combining re- (back) and cul (buttocks, rear). The sense of "springing back" (as in a gun) emerged in the 16th century, metaphorically extending the idea of "drawing back" physically or emotionally. The morphemes re- and coil reflect the dual motion of retreating (re-) and tightening/springing (coil).
The soldier recoiled in horror at the sight of the explosion.
The rifle recoiled sharply after each shot.
She felt a recoil of disgust when touching the slimy surface.
The cat recoiled when the dog barked loudly.
Proper stance helps minimize recoil when shooting.