- free of deceit, hypocrisy, or falseness; earnest: a sincere apology.
- genuine; real: a sincere effort to improve; a sincere friend.
- pure; unmixed; unadulterated.
- Obsolete. sound; unimpaired.
Origin of sincere
SynonymsSee more synonyms for on Thesaurus.com
Examples from the Web for sincerest
It used to be that we said that imitation is the sincerest form of flattery.You Can’t ‘Steal’ a Culture: In Defense of Cultural Appropriation
July 15, 2014
If that makes the series sound like a slog, my sincerest apologies.Why ‘The Americans’ Is the Best Spy Show on TV
February 26, 2014
If imitation really is the sincerest form of flattery, maybe Miley will land that Vogue cover after all.Miley Cyrus Debuts Anna Wintour-esque Bob; Lady Gaga Dresses as a Christmas Tree
The Fashion Beast Team
December 9, 2013
My sincerest hope is that the film, Betty and Coretta, will encourage all to learn more.How Betty Shabazz Persevered After Her Husband, Malcolm X, Was Killed
February 2, 2013
This was a case where imitation was decidedly not the sincerest form of flattery.Obama Has a Mean Streak and He Turned It on Romney This Week
May 26, 2012
He was physician to Madame de Pompadour, and one of the sincerest and most single-hearted of men probably in Paris at the time.The Secret Memoirs of Louis XV./XVI, Complete
Madame du Hausset, an "Unknown English Girl" and the Princess Lamballe
The sincerest of women will make no unnecessary confidences to a man.Chance
This can only be done by a writer of feeling, of imagination, and of the sincerest art.Peak and Prairie
Is not this the sincerest yet rudest voice of the spirit of man?
I beseech you to tell me all, trusting in me for my sincerest sympathy.Major Frank
A. L. G. Bosboom-Toussaint
- not hypocritical or deceitful; open; genuinea sincere person; sincere regret
- archaic pure; unadulterated; unmixed
- obsolete sound; whole
Word Origin and History for sincerest
1530s, "pure, unmixed," from Middle French sincere (16c.), from Latin sincerus, of things, "whole, clean, pure, uninjured, unmixed," figuratively "sound, genuine, pure, true, candid, truthful," of uncertain origin. Ground sense seems to be "that which is not falsified." Meaning "free from pretense or falsehood" in English is from 1530s.
There has been a temptation to see the first element as Latin sine "without." But there is no etymological justification for the common story that the word means "without wax" (*sin cerae), which is dismissed out of hand by OED and others, and the stories invented to justify that folk etymology are even less plausible. Watkins has it as originally "of one growth" (i.e. "not hybrid, unmixed"), from PIE *sm-ke-ro-, from *sem- "one" (see same) + root of crescere "to grow" (see crescent).