C2 adjective /ɪnˈvɛtərət/
inveterate
根深蒂固
Meaning
having a long-established habit, activity, or interest that is unlikely to change
Example
He is an inveterate reader who spends hours in the library every day.
他是一个根深蒂固的读者,每天在图书馆度过几个小时。