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say it: uhn-SHUUR
unsure is an adjective meaning "lacking self-confidence". It carries 2 recorded senses.
lacking or indicating lack of confidence or assurance
“uncertain of his convictions”
“unsure of himself and his future”
“moving with uncertain (or unsure) steps”
“an uncertain smile”
“touched the ornaments with uncertain fingers”
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 unsure 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.