In a way that shows you think someone or something is worthless or deserving of scorn and disrespect.
From contemptuous (adjective) + -ly (adverb suffix). Contemptuous comes from Latin contemptus, past participle of contemnere (to despise), from con- (with) + temnere (to scorn).
This word perfectly captures the sneering tone of disdain—notice how the pronunciation itself sounds like a dismissive sniff. The Romans didn't just dislike things; they systematically despised them, which is why they built a whole word family around contempt.
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