Sanctimonious
adj. Pretending to be righteous
Sentences
We knew John had only been sanctimonious when he ended up double-crossing us.
The sanctimonious cat pranced down the street with her head held up.
Steve knew he had to be sanctimonious because the group of followers needed a leader.
Sheldon Cooper: My brain is better than everybody's!
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Synonyms
Self-righteous
Smug
Antonyms
Humble
Modest