Webster’s Revised Unabridged Dictionary · 1913
Ingrateful
In′grate′ful (ĭn·grāt′fl), a. [L. ingratus ingrateful (pref. in- not + gratus beloved, dear, grateful) + -ful: cf. F. ingrat. See Grateful.]
1. Ungrateful; thankless; unappreciative. Milton.
He proved extremely false and ingrateful to me. Atterbury.
2. Unpleasing to the sense; distasteful; offensive.
He gives . . . no ingrateful food. Milton.
— In′grate′ful·ly, adv. — In′grate′ful·ness, n.