Definitions

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.

Articulate and sincere, he makes this journey worth taking even for those not devoted to cult documentaries.

From Los Angeles Times • Jun. 9, 2026

This is very often a mistake, so I put it to Ms. de Graaf: How sincere is Mr. Putin about any of this?

From The Wall Street Journal • Jun. 5, 2026

"I also take this opportunity to express my sincere gratitude to the government and people of India, the United States and all our supporters," he said.

From Barron's • May 27, 2026

Even so, “The Late Show with Stephen Colbert” was and is sincere and wholesome, even moving at times.

From Salon • May 21, 2026

So when you’re evaluating whether she’s sincere in her belief or a lunatic, you should know she’s got more degrees, speaks more languages, and has seen more of the world than most people you know.

From "Everything Sad Is Untrue" by Daniel Nayeri

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

Interested in learning more words like this one? Our team at Vocabulary.com has got you covered! You can review flashcards, quiz yourself, practice spelling, and more – and it's all completely free to use!

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!