ingrateful

Webster's Dictionary (1913)

Origin: L. ingratus ingrateful (pref. in- not + gratus beloved, dear, grateful) + -ful: cf. F. ingrat. See Grateful.

1. Ungrateful; thankless; unappreciative. John Milton

He proved extremely false and ingrateful to me.— Francis Atterbury

2. Unpleasing to the sense; distasteful; offensive.

He gives... no ingrateful food.— John Milton

— In′wb-a1′>′grate′wb-a2′>′ful·ly, adverb — In′wb-a1′>′grate′wb-a2′>′ful·ness, noun

Webster’s Revised Unabridged Dictionary (1913), from GCIDE 0.54