Meaning of the word "become ingrained" in English

What does "become ingrained" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

become ingrained

US /bɪˈkʌm ɪnˈɡreɪnd/
UK /bɪˈkʌm ɪnˈɡreɪnd/

Idiom

to be firmly established and difficult to change

Example:
The habit of checking his phone every few minutes had become ingrained.
These beliefs have become ingrained in the culture over centuries.