say it: in-sin-SIR
insincere is an adjective meaning "lacking sincerity". It carries one recorded sense.
lacking sincerity
“a charming but thoroughly insincere woman”
“their praise was extravagant and insincere”
Definitions, synonyms and semantic relations for insincere 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.