Etymology
Advertisement

insincere (adj.)

1620s (implied in insincerely), from Latin insincerus "spoiled, corrupted; not genuine, not pure, adulterated," from in- "not" (see in- (1)) + sincerus "genuine, candid" (see sincere). Related: Insincerely.

updated on December 03, 2015

Advertisement
Advertisement
Definitions of insincere from WordNet

insincere (adj.)
lacking sincerity;
their praise was extravagant and insincere
a charming but thoroughly insincere woman
Etymologies are not definitions. From wordnet.princeton.edu, not affiliated with etymonline.