involuntary

1. ADJ If you make an involuntary movement or exclamation, you make it suddenly and without intending to because you are unable to control yourself. 不由自主的

Another surge of pain in my ankle caused me to give an involuntary shudder. 踝关节的又一阵疼痛使我不由自主地颤抖了一下。

2. involuntarilyADV 不由自主地[ADV with v]

His left eyelid twitched involuntarily. 他的左眼皮不由自主地跳着。

3. ADJ You use involuntary to describe an action or situation that is forced on someone. 非自愿的

...insurance policies that cover death, accident, sickness and involuntary unemployment. …承保死亡、事故、疾病和非自愿性失业的保险。