[ in-sin-ser-i-tee ]
/ ˌɪn sɪnˈsɛr ɪ ti /

noun, plural in·sin·cer·i·ties for 2.

the quality of being insincere; lack of sincerity; hypocrisy; deceitfulness.
an instance of being insincere: He recalled their many past insincerities.

Origin of insincerity

First recorded in 1540–50; in-3 + sincerity Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Examples from the Web for insincerity