Answer: entrenched

AnswerCrossword Clue
ENTRENCHEDDeeply rooted
ENTRENCHEDDug in
ENTRENCHEDEstablished in a strong position.
ENTRENCHEDStrongly established.
ENTRENCHEDConfirmed
entrenched(of an attitude, habit, or belief) Firmly established and difficult or unlikely to change; ingrained
entrenchedENTRENCH, to fix firmly, also INTRENCH