Definify.com
Webster 1913 Edition
Ingrateful
In′grateˊful
,Adj.
 [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. 
– In′grateˊful-ly
, adv.
 In′grateˊful-ness
, Noun.
Definition 2025
ingrateful
ingrateful
English
Adjective
ingrateful (comparative more ingrateful, superlative most ingrateful)
-  ungrateful; not grateful
- 1667: Therefore what he gives / (Whose praise be ever sung) to man in part / Spiritual, may of purest Spirits be found / No ingrateful food — John Milton, Paradise Lost
- 1667: Ingrateful Eve — John Milton, Paradise Lost
- 1671: under change of times, And condemnation of the ingrateful multitude. — John Milton,Samson Agonistes