Also, sit idly by. Refrain from interfering, remain passive, as in I can't just sit by and let her get in trouble.
|be inactive or indifferent while something is happening; "Don't just sit by while your rights are violated!"|
|an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.|
|a scrap or morsel of food left at a meal.|