set in one's ways

English

Adjective

set in one's ways

1. (idiomatic) Driven by habit; inclined or determined to continue according to one's custom or established preferences.
   • 1913, E. Phillips Oppenheim, The Double Life Of Mr. Alfred Burton, ch. 20,

     He's as set in his ways now as a little old man.

Synonyms

• headstrong, inflexible