Definition of if one knows what's good for one
- You'll take my advice if you know what's good for you.
- She'll forget about the whole thing if she knows what's good for her.
: to perceive directly : have direct cognition of
: to have understanding of
: to recognize the nature of : discern
used as an interrogative expressing inquiry about the identity, nature, or value of an object or matter
often used to ask for repetition of an utterance or part of an utterance not properly heard or understood
: in what respect : how
used as an interrogative expressing inquiry about the identity, nature, or value of a person, object, or matter
: how remarkable or striking for good or bad qualities
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