篭もる
こもる
to be filled with (emotion, enthusiasm, etc.), to be muffled (e.g. voice), to confine oneself in a temple to pray, to hold (a castle, fortress, etc.), to fill the room (of a gas, smell, etc.), to be heavy with (e.g. smoke), to be stuffy, to be dense, 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)