What is the opposite of sincere?

Need antonyms for sincere? Here's a list of opposite words from our thesaurus that you can use instead.

Adjective
Opposite of felt or believed genuinely and deeply
“This affected smile, which is just a grimace and a habit will become agreeable and obliging only when Monseigneur really wants to be liked.”
Adjective
Opposite of forthright and upfront in nature
“It is not totally incomprehensible that some people find Britney's coyness in interviews disingenuous.”
Adjective
Opposite of having virtuous or righteous intent
“Joffrey and his family look like they have a lot of the good things in life, and a lot of those good things were surely gained through immoral actions.”
Adjective
Opposite of having an unpretentious nature
“The band makes no bones about acknowledging their soul, funk, and jazz roots of hip-hop without being pretentious posers.”
Adjective
Opposite of exhibiting enthusiasm or strong passion
Adjective
Opposite of having or showing whole, sincere and enthusiastic support
Adjective
Opposite of felt or believed deeply and sincerely
“With an insincere apology, she shuffled off, furtively glancing over her shoulder to make sure no one had seen her colluding with a stranger.”
Adjective
Opposite of following carefully and exactly a set of rules
“James was merely a casual follower of his professed religion, not being one to strictly adhere to its tenets.”
Adjective
Opposite of honest or frank in nature
“While her response was quite cut-and-dried, some fans are still speculating the star is hiding her love life as evidenced by her indirect response to who her crush was.”
Adjective
Opposite of open, honest, and direct in speech or writing, especially when dealing with unpalatable matters
Adjective
Opposite of honest and straightforward in speech or behavior
“The audience took very little away from Mike's dissembling interview.”
Adjective
Opposite of faithfully committed to a cause or belief
Adjective
Opposite of in good faith
Adjective
Opposite of warm and friendly
“Looking up at the large, unfriendly face, McBeath decided this was not the moment for honesty.”
Adjective
Opposite of having pledged oneself to a particular belief or course of action
“He stands untrammeled and uncommitted to any faction.”
Adjective
Opposite of significant or extreme in degree or intensity
“Some teens claim that depictions of violence in the media have only affected them in a minor way.”
Adjective
Opposite of based on correct or acceptable principles of reasoning
“Using classism to associate negative behaviors to the less fortunate is simply an insulting and invalid justification for this behavior.”
Adjective
Opposite of devoted completely to one object
Adjective
Opposite of honest, frank and forthright in nature
Adjective
(of a person) Opposite of sincere and serious in intention
Adjective
Opposite of loyal or faithful in nature
“Your constant switch of allegiance makes you a disloyal supporter.”
Adjective
Opposite of having or done with good, honest intentions
Adjective
(informal) Opposite of to be under no illusion, or to be serious about a matter
“You are deluded if you think things are going to work out between the two of you.”
Adjective
Opposite of having a good reputation and well respected
Adjective
Opposite of most intimate or private
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