sanctimonious
adjective /ˌsæŋktɪˈməʊniəs/
  /ˌsæŋktɪˈməʊniəs/
(disapproving)- giving the impression that you feel you are better and more moral than other people synonym self-righteous- a sanctimonious voice
- I wish she’d stop being so sanctimonious.
- I’m fed up with his sanctimonious attitude.
 Word Originearly 17th cent. (in the sense ‘holy in character’): from Latin sanctimonia ‘sanctity’ (from sanctus ‘holy’) + -ous.