こもkomoruこもkomoruこもkomorukoもるmoru
1.

To remain within a certain place or space, isolating oneself from the outside world and refraining from going out.

2.

To exist in a state where something does not escape or disperse outward, often resulting in a feeling of enclosure or containment.

3.

To embody or contain a significant amount of unseen emotions or forces within oneself, often manifesting as a deep connection or intent.

Example:

彼は、よく書斎にこもって、こういうものを書きます。