n the backward jerk of a gun when it is fired
n a movement back from an impact
v draw back, as with fear or pain
v come back to the originator of an action with an undesired effect
v spring back; spring away from an impact
v spring back, as from a forceful thrust
n. （尤指枪炮的）反冲, 后坐力( recoil的名词复数 )
v. 畏缩( recoil的第三人称单数 ); 退缩; 报应; 返回