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[uhn-thangk-fuh l]
See more synonyms for unthankful on Thesaurus.com
  1. not thankful; ungrateful.
  2. not repaid with thanks; thankless: an unthankful task.
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Origin of unthankful

Middle English word dating back to 1350–1400; see origin at un-1, thankful
Related formsun·thank·ful·ly, adverbun·thank·ful·ness, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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Examples from the Web for unthankful

Historical Examples

  • Mary took the news of her great promotion in an unthankful spirit.

    Mary Gray

    Katharine Tynan

  • The Bible says He is good to all, and kind even to the unthankful.

  • But you women are an unthankful race, and don't deserve our kindness.

  • We see it in his not withholding that abundance even from the unthankful.

  • Nor shall we do dishonour to this realm, nor be unthankful for these benefits.

    Stories from Virgil

    Alfred J. Church