insincere

Someone who's insincere is a little bit fake or phony. Your classmate's insincere apology for interrupting you probably sounds like she doesn't really mean it.

When you're insincere, you're not being completely honest. A losing politician often gives an insincere-sounding concession speech, and a teacher who's having a terrible day might wear an insincere smile on her face. The adjective sincere, "coming from genuine, honest feelings," is at the root of insincere — the Latin prefix in, or "not," is combined with sincerus, "sound, pure, or whole."

Definitions of insincere
1

adj lacking sincerity

“a charming but thoroughly insincere woman”
“their praise was extravagant and insincere
Synonyms:
counterfeit, imitative
not genuine; imitating something superior
dishonest, dishonorable
deceptive or fraudulent; disposed to cheat or defraud or deceive
artful, disingenuous
not straightforward or candid; giving a false appearance of frankness
unreal
lacking in reality or substance or genuineness; not corresponding to acknowledged facts or criteria
bootlicking, fawning, obsequious, sycophantic, toadyish
attempting to win favor from influential people by flattery
buttery, fulsome, oily, oleaginous, smarmy, soapy, unctuous
unpleasantly and excessively suave or ingratiating in manner or speech
dissimulative
concealing under a false appearance with the intent to deceive
false
deliberately deceptive
feigned
not genuine
gilded, meretricious, specious
based on pretense; deceptively pleasing
hypocritical
professing feelings or virtues one does not have
plausible
given to or characterized by presenting specious arguments
false
not in accordance with the fact or reality or actuality
Antonyms:
sincere
open and genuine; not deceitful
echt, genuine
not fake or counterfeit
honest, honorable
not disposed to cheat or defraud; not deceptive or fraudulent
artless, ingenuous
characterized by an inability to mask your feelings; not devious
existent, real
being or occurring in fact or actuality; having verified existence; not illusory
bona fide
undertaken in good faith
cordial
sincerely or intensely felt
dear, devout, earnest, heartfelt
earnest
honest
without dissimulation; frank
genuine, true, unfeigned
not pretended; sincerely felt or expressed
heart-whole, whole-souled, wholehearted
with unconditional and enthusiastic devotion
true
consistent with fact or reality; not false
show more antonyms...

Sign up, it's free!

Whether you're a student, an educator, or a lifelong learner, Vocabulary.com can put you on the path to systematic vocabulary improvement.