[in.sin.cere] adj [L insincerus, fr. in- + sincerus sincere] (1634): not sincere: hypocritical -- in.sin.cere.ly adv -- in.sin.cer.i.ty n
INSINCERE
Meaning of INSINCERE in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012