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n. pl. in·fi·del·i·ties
a. Unfaithfulness to a sexual partner, especially a spouse.
b. An act of sexual unfaithfulness.
2. Lack of fidelity or loyalty.
3. Lack of religious belief.


n, pl -ties
1. lack of faith or constancy, esp sexual faithfulness
2. lack of religious faith; disbelief
3. an act or instance of disloyalty


(ˌɪn fɪˈdɛl ɪ ti)

n., pl. -ties.
1. marital unfaithfulness; adultery.
2. disloyalty.
3. a breach of trust; transgression.



backdoor man An illicit lover; a person with whom one is having an affair. Such a one presumably enters by the back door to avoid being seen.

bedswerver An adulteress; a woman who strays from the marriage bed. Shakespeare used the term in The Winter’s Tale:

That she’s
A bedswerver, even as bad as those That vulgars give bold’st titles. (II, i)

cuckold This term for the unwitting husband of an unfaithful wife supposedly derives from the cuckoo bird’s habit of depositing its eggs in other birds’ nests. The theory would have more plausibility if the word were cuckoo itself and were applied not to the injured party but to the adulteress, as is the case in several other languages. According to Dr. Johnson, the cry of “cuckoo” was formerly used to inform the husband, who subsequently came to be dubbed by the term himself. But even this does not account for the transformation from cuckoo to cuckold. A possibly more plausible explanation may be that the suffix-wold, akin to wild, was coupled with coke ‘cock’ to create a compound meaning ‘horn-mad,’ which may well describe a frustrated husband’s condition, in the circumstances. Compare wittol.

false as Cressida Unfaithful, perfidious; pledging love and fidelity while practicing cuckoldry and adultery; two-faced, hypocritical; traitorous. According to legend set during the Trojan War, Cressida, the daughter of a Trojan priest, had exchanged a pledge of everlasting love and fidelity with Troilus, her beloved. When Cressida was offered to the Greeks in exchange for a group of prisoners, the pledge of fidelity was renewed and sealed with an exchange of gifts. But Cressida had barely arrived in the Greek camp when she succumbed to the charms of Diomedes. To make her abandonment of Troilus even more bitter, she wanted Diomedes to wear Troilus’ gift of a sleeve during their frequent encounters. The legend has been immortalized by Chaucer in Troilus and Criseyde and by Shakespeare:

“Yea,” let them say, to stick the heart of falsehood,
“As false as Cressid.”
(Troilus and Cressida, III, i)

hanky-panky See MISCHIEF.

wear the bull’s feather To be cuckolded. The bull’s feather was a symbol of cuckoldry. A 17th-century song entitled “The Bull’s Feather” popularized this expression.

It chanced not long ago as I was walking,
An eccno did bring me where two were a talking,
Twas a man said to his wife, dye had I rather,
Than to be cornuted and wear a bulls feather.

wear the horns To be made a cuckold, to have an unfaithful wife. The association of horns with cuckoldry appears in many European languages, but no totally satisfactory explanation of the link has been offered. The most plausible relates the cuckold’s “horns” to the spurs of a castrated rooster, formerly implanted at the roots of the excised comb where they reputedly grew into appendages resembling horns. The fact that the German word for cuckold formerly meant ‘capon’ lends considerable credence to this otherwise questionable account. Since the deceived husband has been symbolically stripped of his manhood, the association is logical as well. Whatever the connection, the usage was pervasive. The following appeared in Hickscorner, a pre-Shakespearean drama.

My mother was a lady of the stews’ blood born,
And, … my father wore a horn.

wittol A husband who knows of—and tolerates—his wife’s infidelity. The word is modeled on the older cuckold, with wit-‘knowledge’ as a prefix. Both cuckold and wittol trace back to Middle English; the latter—at least the word—is archaic. Compare cuckold.

ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.infidelity - the quality of being unfaithfulinfidelity - 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
faithfulness, fidelity - the quality of being faithful



خِيانَه، عَدَم إخْلاص
ótryggî, ótrúnaîur


[ˌɪnfɪˈdelɪtɪ] N (to partner) → infidelidad f (to a) (to principle, cause) → deslealtad f (to para con)


[ˌɪnfɪˈdɛlɪti] n [wife, husband, lover] → infidélité f


nUntreue f


[ˌɪnfɪˈdɛlɪtɪ] ninfedeltà f inv


(infiˈdeləti) noun
disloyalty or unfaithfulness (eg to one's husband or wife).
References in classic literature ?
She felt somewhat like a woman who in a moment of passion is betrayed into an act of infidelity, and realizes the significance of the act without being wholly awakened from its glamour.
Altogether in his culture and want of culture,--in his crude, wild, and misty philosophy, and the practical experience that counteracted some of its tendencies; in his magnanimous zeal for man's welfare, and his recklessness of whatever the ages had established in man's behalf; in his faith, and in his infidelity.
Bethink thee, if thou dost relapse into thine infidelity, though thou are not so tender as a suckling pig I would I had one to break my fast upon thou art not too tough to be roasted
The INFINITE DIVISIBILITY of matter, or, in other words, the INFINITE divisibility of a FINITE thing, extending even to the minutest atom, is a point agreed among geometricians, though not less incomprehensible to common-sense than any of those mysteries in religion, against which the batteries of infidelity have been so industriously leveled.
The old man died, as I have told you; had he lived, Mercedes, perchance, had not become the wife of another, for he would have been there to reproach her infidelity.
Happily for Julia, the image of Antonio presented itself to save her from infidelity to her old attachment, and she replied--
I do not forgive neglect -- I cannot endure infidelity.
I will expound to you -- as I alone can -- the secret of the enginery that effected the Rattleborough miracle -- the one, the true, the admitted, the undisputed, the indisputable miracle, which put a definite end to infidelity among the Rattleburghers and converted to the orthodoxy of the grandames all the carnal-minded who had ventured to be sceptical before.
They had communities of knowledge, "their" knowledge (this discriminating possessive was always on her lips) of presences of the other age, presences all overlaid, in his case, by the experience of a man and the freedom of a wanderer, overlaid by pleasure, by infidelity, by passages of life that were strange and dim to her, just by "Europe" in short, but still unobscured, still exposed and cherished, under that pious visitation of the spirit from which she had never been diverted.
These things put arguments into the mouth of infidelity.
Having settled ourselves into this infidelity, our skill is expended to procure alleviations, diversion, opiates.
Porthos and his companion alighted before the gate of the little chateau, where we are about to meet again our old acquaintances Athos and Bragelonne, the latter of whom had disappeared since the discovery of the infidelity of La Valliere.