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.

See Examples For:

sincerest

“Skydive Perris offers its sincerest condolences to the individual’s family and politely asks for privacy as we mourn together as a community,” according to the statement.

From Los Angeles Times ● Jun. 2, 2026

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

"On behalf of Durham Constabulary I wish to publicly offer my sincerest apologies to those victims and their families for those failures," she said.

From BBC ● Nov. 12, 2025

And she got results: the Maryland State Senate sent a resolution on fancy paper, saying, “Be it hereby known to all that The Senate of Maryland offers its sincerest congratulations to Henrietta Lacks.”

From "The Immortal Life of Henrietta Lacks" by Rebecca Skloot