/ɪnˈtrentʃ/
en·trench (also in·trench)
BrE /ɪnˈtrentʃ/
NAmE /ɪnˈtrentʃ/
[usually passive]
~ sth
(sometimes disapproving)
to establish sth very firmly so that it is very difficult to change
Sexism is deeply entrenched in our society.
entrenched attitudes/interests/opposition