ingrained
adjectiveUK /ɪnˈɡreɪnd/
US /ɪnˈɡreɪnd/
Something ingrained is so deep inside that it is very hard to change.
Her habit of saying thank you was ingrained from childhood.
OTHER MEANINGS
2. Firmly fixed in something so it cannot be easily removed.
The dirt was ingrained in the carpet.
3. Made up of fibers that are dyed before being woven.
He wore an ingrained wool sweater.
4. Having a quality that has become a natural part of someone.
His ingrained kindness made everyone feel welcome.