Dictionary / Vocabulary / 忘恩
ぼうおん
ingratitude; thanklessness
両親の面倒を見ない人は忘恩の罪を犯す。
People who do not look after their parents are guilty of ingratitude.
彼女が散々してやった挙げ句の果てが忘恩だった。
All she got for her pains was ingratitude.