閉じる
とじる to close (e.g. book, eyes, meeting, etc.) to shut

閉じ篭る
とじこもる to seclude oneself to shut oneself away

閉じ籠る
とじこもる to seclude oneself to shut oneself away

閉じ込む
とじこむ to (keep on) file

閉じ込める
とじこめる to lock up to shut up to imprison