◆ to bite into (e.g. rope into skin), to cut into, to dig into (e.g. of fingernails)
◆ to eat into, to encroach, to make inroads, to penetrate (e.g. a market), to break into (e.g. first place), to erode, to cut into (e.g. time, savings)
◆ to be wedged (i.e. underwear pulled from the back, driving it between the buttocks)