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insincere

[in-sin-seer] /ˌɪn sɪnˈsɪər/
adjective
1.
not sincere; not honest in the expression of actual feeling; hypocritical.
Origin
1625-1635
1625-35; < Latin insincērus tainted, dishonest; see in-3, sincere
Related forms
insincerely, adverb
Synonyms
deceitful, disingenuous, guileful, two-faced.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for in sincerest

insincere

/ˌɪnsɪnˈsɪə/
adjective
1.
lacking sincerity; hypocritical
Derived Forms
insincerely, adverb
insincerity (ˌɪnsɪnˈsɛrɪtɪ) noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for in sincerest

insincere

adj.

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
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2
3
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