superciliously
Adverb
Meaning
with a sneer; in an uncomplimentary sneering manner
Source: WordNetSynonyms
proudly
sarcastically
triumphantly
arrogantly
contemptuously
haughtily
imperiously
condescendingly
mockingly
loftily
insolently
sneeringly
smugly
complacently
cavalierly
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Antonyms
Examples
It is supposed that there has been progress in the science of textual criticism, and the most frivolous pretender has learned to talk superciliously about "the old unscientific days."
`I don't believe in these customs,' he said sneeringly