i-adjective
deep-rooted; ingrained; deep-seated
Describes problems, habits, feelings, or beliefs that are firmly established and hard to change. Often used with negative nouns like 問題, 対立, 不信, 習慣.
両者の間には根深い対立がある。
There is a deep-rooted conflict between the two sides.
その習慣は地域
That custom remains deeply ingrained in the region.