involuntary

in'vɒlәntәri

托福GRE Collins 1

a. not subject to the control of the will
a. controlled by the autonomic nervous system; without conscious control

a. 自然而然的, 无意识的, 不知不觉的, 偶然的, 不随意的
[医] 不随意的

Collins 星级

9,830

BNC 频率

11,042

使用频率

involuntary 由前缀 in-（表示否定）和词根 voluntary（自愿的）组成，因此整体意思是“非自愿的”或“不是自愿的”。

例句

1. His involuntary reaction to the loud noise surprised everyone.

他对大声噪音的非自愿反应让大家都感到惊讶。

2. She made an involuntary movement when the doctor touched her arm.

当医生触碰她的手臂时，她做出了一个不由自主的动作。

3. Some people experience involuntary muscle spasms during exercise.

有些人在锻炼时会出现不自主的肌肉痉挛。