食(く)い込(こ)むto bite into (e.g. rope into skin), to cut into, to dig into (e.g. of fingernails)

Common

1. う-verb (む), Intransitive verb

   1. 1.

      to bite into (e.g. rope into skin), to cut into, to dig into (e.g. of fingernails)

   2. 2.

      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)

   3. 3.

      to be wedged (i.e. underwear pulled from the back, driving it between the buttocks)

      Vulgar expression or word