unfaithfulness

From unfaithful +‎ -ness.

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unfaithfulness (countable and uncountable, plural unfaithfulnesses)

1. The characteristic of being unfaithful.

   Synonyms: infidelity, disloyalty

   Antonyms: faithfulness, fidelity, loyalty

   • 1961, Harry E. Wedeck, Dictionary of Aphrodisiacs, New York: The Citadel Press, page 175:

     For even the enchantresses Circe and Medea could not, by their black arts, prevent the unfaithfulness of Odysseus and Jason.