not sincere; not honest in the expression of actual feeling; hypocritical.

Origin of insincere

1625–35; < Latin insincērus tainted, dishonest; see in-3, sincere
Related formsin·sin·cere·ly, adverb

Synonyms for insincere Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for insincere

Contemporary Examples of insincere

Historical Examples of insincere

  • This feeling was intensified by the belief that Swift, as a clergyman, was insincere.

  • An insincere profession will be distinguished by partiality in its observances.

  • Was it not, perhaps, wise to have been insincere in such a matter?


    Rafael Sabatini

  • He is a foreigner, with the soft, insincere ways that I cannot like nor trust.

    Against Odds

    Lawrence L. Lynch

  • That the worshipper should be insincere in his worship was too dreadful to think of.

    Lord Kilgobbin

    Charles Lever

British Dictionary definitions for insincere



lacking sincerity; hypocritical
Derived Formsinsincerely, adverbinsincerity (ˌɪnsɪnˈsɛrɪtɪ), noun
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

Word Origin and History for insincere

1620s (implied in insincerely), from Latin insincerus "not genuine, not pure, adulterated," from in- "not" (see in- (1)) + sincerus (see sincere).

Online Etymology Dictionary, © 2010 Douglas Harper