Sneer
Sneer (noun & verb) /snɪəʳ/ US /snɪr/
verb: to show, feel or say something with contempt, scorn or hostility – scorn – mock – deride – laugh at, scoff, disparage
We all sneered at his odd idea, but in the end, it turned out that he was right.
Adjective: sneering
Adverb: sneeringly