adjective Etymology: Latin insincerus, from in- + sincerus sincere Date: 1634 not sincere ; hypocritical , ~ly adverb insincerity noun
INSINCERE
Meaning of INSINCERE in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012