supercilious
adjective
su·per·cil·ious
ˌsü-pər-ˈsi-lē-əs
-ˈsil-yəs
: coolly and patronizingly haughty
reacted to their breach of etiquette with a supercilious smile
superciliously
adverb
superciliousness
noun
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Merriam-Webster unabridged
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