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Related to sit by: Nabe
sit by someone
to sit next to someone. May I sit by you? Come over here and sit by me.
sit (idly) by (and do something)
to take no action I felt we simply couldn't sit by and see the peace process threatened. We can't afford to sit idly by while dangerous people threaten our way of life.
Also, sit idly by. Refrain from interfering, remain passive, as in I can't just sit by and let her get in trouble.
To remain uninvolved; refrain from acting: I did the work while the others sat by and watched.