no obj.
1- suddenly spring or flinch back in fear, horror, or disgust（因害怕、恐惧或讨厌）弹回, 跳回：
he recoiled in horror.
他吓得直往后退。
1.1
- feel fear, horror, or disgust at the thought or prospect of something; shrink mentally想起来感到害怕（或恐惧、讨厌）; 退却, 后退; 退缩, 畏缩：
Ronni felt herself recoil at the very thought.
朗尼一想起这一点就感到恐惧。
1.2
- (of a gun) move abruptly backwards as a reaction on firing a bullet, shell, or other missile（枪炮）产生后坐力, 反冲。
1.3
- rebound or spring back through force of impact or elasticity回弹, 反弹：
the muscle has the ability to recoil.
肌肉有回弹力。
1.4
recoil on/upon
(of an action) have an adverse reactive effect on (the originator)（动作）对（作用力）产生反作用力; 反冲。
mass noun
- the action of recoiling弹回, 跳回; 后坐力; 反弹; 反冲：
his body jerked with the recoil of the rifle.
步枪的反冲力使他的身体猛地震动了一下。
派生词
recoilless
adjective词源
Middle English (denoting the act of retreating)： from Old French reculer 'move back', based on Latin culus 'buttocks'.