sincere

adjective

sin·​cere sin-ˈsir 

sən-

sincerer; sincerest

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

• heartfelt
• unfeigned

Choose the Right Synonym for sincere

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

But over time, his use of symbols and rhetoric have grown more extreme and more violent — so much so that it’s gotten hard to keep track — and further gotten hard to tell how much of this is irony, how much of it is innocence, and how much of it is a sincere embrace of white supremacist rhetoric. —Aja Romano, Vox, 7 Feb. 2025

Unusually, the side stories are actually a little stronger than Ferrell’s main one, thanks largely to a committed and sincere performance from Woody Harrelson. —Tim Grierson, Vulture, 4 Feb. 2025

The stand-in restitution felt like compensation without the sincere recognition of the offense. —Holly Rizzuto Palker, Parents, 28 Jan. 2025

The always astonishing Ben Whishaw plays the sweet, morose, gay, chain-smoking, furtively sincere, faraway-eyed Hujar, a veteran freelance photographer who was just coming into his own as a gallery artist and downtown scenester. —Owen Gleiberman, Variety, 27 Jan. 2025

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

Kids Definition

sincere

adjective

sin·​cere sin-ˈsi(ə)r 

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