こもる

to shut oneself in (e.g. one's room); to be confined in; to seclude oneself; to hide away; to stay inside (one's shell)

to fill with (emotion, enthusiasm, power, etc.); to imbue with; to infuse with

to fill a space (of a gas, smell, etc.); to be heavy with (e.g. smoke); to be stuffy; to be dense

to be muffled (e.g. voice)

to hold (a castle, fortress, etc.)

to confine oneself in a temple to pray