sincerest

ADJECTIVE

straightforward, honest

Synonyms

STRONGEST

candid earnest forthright genuine heartfelt outspoken real serious true trustworthy

WEAK

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

Antonyms

STRONGEST

counterfeit deceitful devious dishonest false flippant insincere invalid trivial unimportant unreal unserious 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.

Parody, in this case, is the sincerest form of flattery.

From The Wall Street Journal • Apr. 21, 2026

"What happened today in Teotihuacan hurts us deeply. I express my sincerest solidarity to the people affected and their families," Sheinbaum wrote.

From Barron's • Apr. 20, 2026

Unifil said of the two deaths on Monday: "We extend our sincerest condolences to the family, friends, and colleagues of those brave peacekeepers who gave their lives in service of peace."

From BBC • Mar. 30, 2026

Life-altering in the sincerest sense of the word, “The Mother Lode” comedically chronicles Rosebud Baker’s journey into motherhood, in real time.

From Los Angeles Times • Dec. 10, 2025

"Your Highness, I hope I have done nothing to offend you, but if I have, my sincerest apologies," Astrid stammers out.

From "The Belles" by Dhonielle Clayton