[in.grat.i.tude] n [ME, fr. MF, fr. ML ingratitudo, fr. L in- + LL gratitudo gratitude] (14c): forgetfulness of or poor return for kindness received: ungratefulness
INGRATITUDE
Meaning of INGRATITUDE in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012