INGRATITUDE
ingratitude, ungratefulness
(noun) a lack of gratitude
Source: WordNet® 3.1
Etymology
Noun
ingratitude (usually uncountable, plural ingratitudes)
A lack or absence of gratitude; thanklessness.
Antonym: gratitude
Source: Wiktionary
In*grat"i*tude, n. Etym: [F. ingratitude, L. ingratitudo. See
Ingrate.]
Definition: Want of gratitude; insensibility to, forgetfulness of, or ill
return for, kindness or favors received; unthankfulness;
ungratefulness.
Ingratitude, thou marble-hearted fiend. Shak.
Ingratitude is abhorred both by God and man. L'Estrange.
Source: Webster’s Unabridged Dictionary 1913 Edition