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
(attributive) Opposite of bearing a complete and unaltered version of
“Jonas has wasted our time by providing ambiguous responses to all of our questions.”
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 totally committed to a cause or belief
Adjective
Opposite of having or showing enthusiastic support
Adjective
Opposite of being a person of good repute and character
“An honest person will have friends who value honesty, and a dishonest one will have cheats as friends.”
Adjective
Opposite of having or displaying a passionate intensity
Adjective
Opposite of in good faith
Adjective
Opposite of warm and friendly
Adjective
Opposite of significant or extreme in degree or intensity
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; to carry one's attitude seriously 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
Adjective
Opposite of being or demonstrating the conduct expected of players of sport
Adjective
Opposite of most intimate or private
Adjective
Opposite of frank
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