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Synonyms

unthankful

American  
[uhn-thangk-fuhl] / ʌnˈθæŋk fəl /

adjective

  1. not thankful; ungrateful.

  2. not repaid with thanks; thankless.

    an unthankful task.

Other Word Forms

  • unthankfully adverb
  • unthankfulness noun

Etymology

Origin of unthankful

Middle English word dating back to 1350–1400; un- 1, thankful

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.