入いり組くむ

godan verb (-mu), intransitive verb

become complicated; get tangled; be intricate

Describes situations, relationships, or physical structures that become complex, entangled, or convoluted.

• 話はなしが入いり組くんでいて、何なにが問もん題だいなのかわからない。

  The story is so complicated that I can't tell what the problem is.

• この路ろ地じは入いり組くんでいるから、初はじめての人ひとは迷まよいやすい。

  These alleys are intricate, so first-timers tend to get lost.