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[sin-seer] /sɪnˈsɪər/
adjective, sincerer, sincerest.
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
1525-35; < Latin sincērus pure, clean, untainted
Related forms
sincerely, adverb
sincereness, noun
quasi-sincere, adjective
quasi-sincerely, adverb
1. frank, candid, honest, open, guileless; unaffected. See earnest1 .
1, 2. false. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for sincerely
Contemporary Examples
Historical Examples
  • I sincerely trust the young man has not suffered a lifetime for the act.

    Between the Lines Henry Bascom Smith
  • "I wish I had your faith in people, Grace," said Emma sincerely.

  • "And it's lucky for me that 'King' Plummer is my friend," said Mr. Grayson, sincerely.

    The Candidate Joseph Alexander Altsheler
  • That is a great deal nowadays, and he loves you most sincerely.

    Thoroughbreds W. A. Fraser
  • "I don't believe Laura will ever be good for anything else," she said sincerely.

    Six Girls and the Tea Room Marion Ames Taggart
British Dictionary definitions for sincerely


not hypocritical or deceitful; open; genuine: a sincere person, sincere regret
(archaic) pure; unadulterated; unmixed
(obsolete) sound; whole
Derived Forms
sincerely, adverb
sincerity (sɪnˈsɛrɪtɪ), sincereness, noun
Word Origin
C16: from Latin sincērus
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for sincerely

1530s, "correctly;" 1550s, "honestly," from sincere + -ly (2). As a subscription to letters, recorded from 1702.



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).

Online Etymology Dictionary, © 2010 Douglas Harper
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