Betrayal, especially of a moral obligation

• unfaithfulness

  1. The characteristic of being unfaithful; infidelity; disloyalty.

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  1. The characteristic of being unfaithful; infidelity; disloyalty.

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• treachery

  1. Willful betrayal of fidelity, confidence, or trust; perfidy.
  2. The act or an instance of such betrayal.

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  1. Willful betrayal of fidelity, confidence, or trust; perfidy.
  2. The act or an instance of such betrayal.

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• treacherousness

  1. Treachery; the characteristic of being treacherous.

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  1. Treachery; the characteristic of being treacherous.

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• traitorousness

  1. The state or quality of being traitorous.

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  1. The state or quality of being traitorous.

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• perfidy

  1. Deliberate breach of faith; calculated violation of trust; treachery:
  2. The act or an instance of treachery.

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  1. Deliberate breach of faith; calculated violation of trust; treachery:
  2. The act or an instance of treachery.

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• perfidiousness

  1. (rare) Unfaithfulness; deceitfulness; perfidy.

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  1. (rare) Unfaithfulness; deceitfulness; perfidy.

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• falsity

  1. The quality or condition of being false.
  2. Something false; a lie.

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  1. The quality or condition of being false.
  2. Something false; a lie.

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• falseness

  1. The characteristic of being false.

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  1. The characteristic of being false.

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• false-heartedness

  1. The quality of being falsehearted.

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  1. The quality of being falsehearted.

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• faithlessness

  1. the quality of being faithless

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  1. the quality of being faithless

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• disloyalty

  1. The quality of being disloyal; faithlessness.
  2. A disloyal act.

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  1. The quality of being disloyal; faithlessness.
  2. A disloyal act.

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Disloyalty

• betrayal

  1. the act of betraying

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  1. the act of betraying

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• treachery

  1. Willful betrayal of fidelity, confidence, or trust; perfidy.
  2. The act or an instance of such betrayal.

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  1. Willful betrayal of fidelity, confidence, or trust; perfidy.
  2. The act or an instance of such betrayal.

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• faithlessness

  1. the quality of being faithless

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  1. the quality of being faithless

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Marital disloyalty

• cuckoldry

  1. The state of being a cuckold.
  2. The act of making someone a cuckold.

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  1. The state of being a cuckold.
  2. The act of making someone a cuckold.

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• cheating

  1. Present participle of cheat.
  2. An act of deception, fraud, trickery, imposture, or imposition.
  3. Unsporting or underhand.

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  1. Present participle of cheat.
  2. An act of deception, fraud, trickery, imposture, or imposition.
  3. Unsporting or underhand.

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• adultery

  1. Consensual sexual intercourse between a married person and a person other than the spouse.

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  1. Consensual sexual intercourse between a married person and a person other than the spouse.

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• unfaithfulness

  1. The characteristic of being unfaithful; infidelity; disloyalty.

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  1. The characteristic of being unfaithful; infidelity; disloyalty.

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