also: いりこむ
godan verb (-mu), intransitive verb
go into; come into; penetrate; get in; step in
Describes entering a physical space, often with a nuance of going deep inside or intruding. Can be used for people, objects, or abstract things like light or sound.
泥棒が窓から家に入り込んだ。
A thief got into the house through the window.
この靴は水が入り込みやすい。
Water easily gets into these shoes.
godan verb (-mu), intransitive verb
become complicated; get tangled
Used for situations, relationships, or matters becoming intricate or messy. Often appears in the form 入り込んだ (past tense) as a modifier meaning 'complicated' or 'involved'.
話が入り込んでしまって、何が問題かわからなくなった。
The discussion got so complicated that I lost track of what the problem was.
入り込んだ事情があるらしい。
There seem to be complicated circumstances.