unthankful

[ uhn-thangk-fuh l ]

/ ʌnˈθæŋk fəl /

not thankful; ungrateful.

not repaid with thanks; thankless: an unthankful task.

Origin of unthankful

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

un·thank·ful·ly, adverb un·thank·ful·ness, noun

Our stay in New Zealand has been too brief; still, we are not unthankful for the glimpse which we have had of it.

Following the Equator, Complete |Mark Twain (Samuel Clemens)
The Israelites seem to have asked for a king from an unthankful caprice and waywardness.

Selections from the Prose Writings of John Henry Cardinal Newman |John Henry Newman
You sweetheart, this is just the way this old, unthankful sinner was taken, just now.

Julia Ward Howe |Laura E. Richards
Just as God causes his sun to rise on the thankful and the unthankful.

Epistle Sermons, Vol. III |Martin Luther

Better be so, and thief too, than unthankful: Pray use this old man so, and then we are paid all.

Beaumont & Fletcher's Works (3 of 10): The Loyal Subject |Francis Beaumont