in other words - in a different (usually more direct) way "In other words, if I don`t finish the assignment by Wednesday I will not pass the course." in over one's head - have more difficulties than one can manage The supervisor was in over his head when he began to try and fire people for no reason. in part - to some extent, partly I think that the reason he is not golfing well this year is in part because of his back problem. in particular - specifically, especially My father likes almost all sports but in particular he loves basketball. in passing - casually, as an aside.