adj. 25B6; adjective INSINCERE, dishonest, untruthful, false, deceitful, duplicitous, lying, mendacious; hypocritical; archaic hollow-hearted.
DISINGENUOUS
Meaning of DISINGENUOUS in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012