say it: SNIR-ing
sneering is an adjective meaning "expressive of contempt". It carries one recorded sense.
expressive of contempt
“curled his lip in a supercilious smile”
“spoke in a sneering jeering manner”
“makes many a sharp comparison but never a mean or snide one”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for sneering come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.