unfaithful
[ uhn-feyth-fuhl ]
/ ʌnˈfeɪθ fəl /
adjective
not faithful; false to duty, obligation, or promises; faithless; disloyal.
not sexually faithful to a spouse or lover.
not accurate or complete; inexact: an unfaithful translation.
Obsolete. unbelieving; infidel.
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Nearby words
unfair, unfair competition, unfair practice, unfairly, unfaith, unfaithful, unfaltering, unfamiliar, unfancied, unfashionable, unfasten
Origin of unfaithful
SYNONYMS FOR unfaithful
Related formsun·faith·ful·ly, adverbun·faith·ful·ness, noun
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for unfaithfulness
British Dictionary definitions for unfaithfulness
unfaithful
/ (ʌnˈfeɪθfʊl) /
adjective
not true to a promise, vow, etc
not true to a wife, husband, lover, etc, esp in having sexual intercourse with someone else
inaccurate; inexact; unreliable; untrustworthyunfaithful copy
obsolete not having religious faith; infidel
obsolete not upright; dishonest
Derived Formsunfaithfully, adverbunfaithfulness, 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 unfaithfulness
unfaithful
mid-14c., "acting falsely," from un- (1) "not" + faithful. In Middle English it also had a sense of "infidel, unbelieving, irreligious" (late 14c.). Sense of "not faithful in marriage" is attested from 1828. Related: Unfaithfully; unfaithfulness.
Online Etymology Dictionary, © 2010 Douglas Harper