sincere

adjective

sin·​cere sin-ˈsir How to pronounce sincere (audio)
sən-
sincerer; sincerest
Synonyms of sincere
1
a
: free of dissimulation : honest
a sincere interest
b
: free from adulteration : pure
a sincere doctrine
sincere wine
2
: marked by genuineness : true
sincereness noun

Synonyms of sincere

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sincere, wholehearted, heartfelt, hearty, unfeigned mean genuine in feeling.

sincere stresses absence of hypocrisy, feigning, or any falsifying embellishment or exaggeration.

a sincere apology

wholehearted suggests sincerity and earnest devotion without reservation or misgiving.

promised our wholehearted support

heartfelt suggests depth of genuine feeling outwardly expressed.

expresses our heartfelt gratitude

hearty suggests honesty, warmth, and exuberance in displaying feeling.

received a hearty welcome

unfeigned stresses spontaneity and absence of pretense.

her unfeigned delight at receiving the award

Examples of sincere in a Sentence

He sounded sincere in his promises. She seemed sincere in her commitment to finish school. She has a sincere interest in painting. He showed a sincere concern for her health. He made a sincere attempt to quit smoking. Please accept our sincere thanks.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
There’s some sincere worry driving these ethics reform campaigns, and a real desire to make Congress incorruptible. — David Weigel, semafor.com, 29 July 2026 Start with one bold expression, keep it sincere, and let joy give your courage a cleaner direction. — Tarot.com, The Orlando Sentinel, 27 July 2026 Konkol, Babu said, sees working at Valpo as a privilege and is very sincere. — Amy Lavalley, Chicago Tribune, 26 July 2026 It was recorded over 12 days in Los Angeles in the aftermath of the 2025 wildfires and marked a shift toward a more deliberate, sincere approach. — Charles Moss, SPIN, 23 July 2026 See All Example Sentences for sincere

Word History

Etymology

Middle French, from Latin sincerus whole, pure, genuine, probably from sem- one + -cerus (akin to Latin crescere to grow) — more at same, crescent

First Known Use

1533, in the meaning defined at sense 1a

Time Traveler
The first known use of sincere was in 1533

Rhymes for sincere

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Browse Nearby Words

since
sincere
sincerely
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Cite this Entry

“Sincere.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sincere. Accessed 5 Aug. 2026.

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Kids Definition

sincere

adjective
sin·​cere sin-ˈsi(ə)r How to pronounce sincere (audio)
sincerer; sincerest
1
: trustworthy, straightforward
a sincere friend
2
: genuine sense 1, real
a sincere interest in painting
sincerely adverb
sincerity
-ˈser-ət-ē, 
-ˈsir-
noun

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