sincere

[sin-seer] / sɪnˈsɪər /

ADJECTIVE

straightforward, honest

Synonyms

STRONGEST

candid earnest for real forthright genuine heartfelt outspoken real serious true trustworthy

WEAK

24-carat aboveboard actual artless bona fide dead-level dear devout faithful frank guileless honest-to-God honest-to-goodness like it is meant natural no-fooling no-nonsense on the level on the line on the up and up open plain pretensionless regular righteous saintly square sure-enough true-blue unaffected undesigning undissembled unfeigned unpretentious up-front wholehearted

Antonyms

STRONGEST

counterfeit deceitful devious dishonest false flippant insincere invalid untrustworthy

WEAK

tricky

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The two did a nice job portraying teenagers who go back and forth from sincere to ridiculously immature, but the best part was their horror when Jost fired back.

From Los Angeles Times • Apr. 12, 2026

Altman isn’t the first billionaire who might do a big media deal for reasons other than sincere interest in media.

From Slate • Apr. 7, 2026

Raudnitz said: "I'm instructed now in the clearest of clear terms the defendant would like to express through me his sincere apologies."

From BBC • Mar. 24, 2026

That’s what Auf der Maur’s roommate told her the night she came home after thinking that she had offered a sincere but thoughtful declination to the suggestion that she become the bass player in Hole.

From Salon • Mar. 24, 2026

In a resolution, which cited each of them by name, the council said, “We express our sincere gratitude for the splendid work done in the matter of investigating and bringing to justice the parties charged.”

From "Killers of the Flower Moon" by David Grann

Vocabulary lists containing sincere

The SAT: Words to Capture Tone, List 2

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ACT Reading Test: Words to Capture Tone, List 1

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The New SAT: Words to Capture Tone

Want to remember this word for good? Start your learning journey today with our library of interactive, themed word lists built by the experts at Vocabulary.com – we'll help you make the most of your study time!