こもって

staying cooped up, shutting oneself away, being filled with, being infused with

→ 籠もる
verb Rare #43,272
staying cooped up, shutting oneself away Te-form of 籠もる; it often connects to another action or state.
JA: 今日は家にこもって本を読みたい。
EN: Today I want to stay home and read a book.
being filled with, being infused with Te-form of 籠もる; used when a feeling or quality is present in something.
JA: 彼の言葉には怒りがこもっていた。
EN: His words were filled with anger.

部屋にこもって泣け

Go shut yourself in your room and cry.

— 最強のふたり (2011)

彼は、よく書斎にこもって、こういうものを書きます。

He often shuts himself away in his study and writes things like this.

家にこもって本が読みたい。

I want to stay home and read books.