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