en·grained
adjective/ɪnˈɡreɪnd/
/ɪnˈɡreɪnd/
(also ingrained)
- engrained (in somebody/something) (of a habit, an attitude, etc.) that has existed for a long time and is therefore difficult to change
根深蒂固的；日久难改的 - (of dirt) under the surface of something and therefore difficult to get rid of
深嵌并难以清除的