Insincere
Pronunciation : In`sin*cere"
Part of Speech : a.
Etymology : [L. insincerus. See In- not, and Sincere.]
Definition : 1. Not being in truth what one appears to be; not sincere; dissembling; hypocritical; disingenuous; deceitful; false; -- said of persons; also of speech, thought; etc.; as, insincere declarations.
2. Disappointing; imperfect; unsound. [Obs.] To render sleep's soft blessings insincere. Pope.
Syn. -- Dissembling; hollow; hypocritical; deceptive deceitful; false; disingenuous; untrustworthy.
Source : Webster's Unabridged Dictionary, 1913