supercilious

behaving as though others are beneath one; haughtily disdainful

“The supercilious waiter corrected our pronunciation of the wine.”

Synonyms

arrogant, haughty, disdainful

Antonyms

humble, deferential

Root

super- (above)

Memory hook

super (above) + cilium (eyebrow): judging you with a raised eyebrow.