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insincere

 
/ˌɪn·sɪnˈsɪər/ adj disapproving

Definition

not feeling, believing, or meaning something although you pretend to; not sincere: an insincere promise/offer insincerity
 
/ˌɪn·sɪnˈser·ɪ·t̬i/ n [U]
There’s often a bit of insincerity in these speeches.
(Definition of insincere adj from the Cambridge Academic Content Dictionary © Cambridge University Press)

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