不由自主
Definitions
- 1. can't help; involuntarily (idiom)
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Word relationships
Usage notes
Common mistakes
Used to describe uncontrollable emotional or physical reactions, not for deliberate decisions. Avoid using it when you consciously choose to do something.
Formality
Common in both spoken and written Chinese, but 不禁 is more literary.
Example Sentences
1 shown看到那个笑话,他 不由自主 地笑了。
AI-generated examples are marked with this icon.