こ
込

む

Godan verb, intransitive verb

1. to be crowded, to be packed, to be congested, to be thronged (with). Usu. 混む.
2. to be complex, to be intricate.

suffix

1. to go into, to go in, to put into.
2. to become (completely).
3. to do thoroughly, to do sufficiently.
4. to remain (silent, seated, etc.), to stay ....