mid-15c., from Late Latin involuntarius "involuntary," from in- "not, opposite of" (see in- (1)) + Latin voluntarius (see voluntary). Related: Involuntarily.
实用例句
1. Other ocular signs include involuntary rhythmic movement of the eyeball.
其他眼征包括眼球的无意识节奏运动。
来自柯林斯例句
2. She shrank back with an involuntary gasp.
她不由得倒抽了口冷气，往后退了退。
来自柯林斯例句
3. The drug's side-effects can include involuntary defecation.
该药的副作用可能包括排便失禁。
来自柯林斯例句
4. Involuntary repatriation of Haitians began this week.
