unthankful

But with the great rousing hosannas, and the last powerful words of the "Agnus Dei" no one was likely to go home uninspired or unthankful.

From Time Magazine Archive

Britain does not intend to abandon her duties; despite the unthankful character of her job.

From Time Magazine Archive

Then he said aloud: "But I don't know of any man who would take on such an unthankful business."

From The Strange Story of Rab R?by by M?r J?kai

You sweetheart, this is just the way this old, unthankful sinner was taken, just now.

From Julia Ward Howe 1819-1910 by Maud Howe Elliott

Thank′less, unthankful: not expressing thanks or favours: not gaining thanks.—adv.

From Chambers's Twentieth Century Dictionary (part 4 of 4: S-Z and supplements) by Various