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a. Not adhering to promises, obligations, or allegiances; disloyal. See Synonyms at faithless.
b. Breaking trust in a marriage or relationship by having sexual relations with someone other than one's spouse or sexual partner.
2. Not justly representing or reflecting the facts or a primary source; inaccurate: an account that was unfaithful to what really happened; a translation that was unfaithful to the original.
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|Noun||1.||unfaithfulness - the quality of being unfaithful |
quality - an essential and distinguishing attribute of something or someone; "the quality of mercy is not strained"--Shakespeare
faithlessness, fickleness, inconstancy, falseness - unfaithfulness by virtue of being unreliable or treacherous
disloyalty - the quality of being disloyal