to shut oneself in (e.g. one's room); to be confined in; to fill with (emotion, enthusiasm, power, etc.); to imbue with; to fill a space (of a gas, smell, etc.); to be heavy with (e.g. smoke); to be muffled (e.g. of a voice)
Examples (2 in total)
しかし王女は部屋に立てこもって出てこなかった。
However, the princess had barricaded herself in her room and wouldn't come out.