こ込koむmuこ混koむmu
1.
To reach a state where a location is filled to capacity with people or things, making it difficult to move or take desired actions.
2.
To become complicated as elements intertwine or involve themselves in a convoluted manner.
3.
To indicate the act of thoroughly completing an action or process to the fullest extent.
4.
To remain in a specific state without returning easily to a normal condition, often implying a deep immersion in that state.
Example:
今晩は列車がとても込んでいる。