恩おんを忘わすれる

expression, ichidan verb

be ungrateful; forget a kindness

Used when someone fails to appreciate or repay a favor or kindness received. Often carries a moral or reproachful tone.

• 彼かれは助たすけてもらったのに、恩おんを忘わすれてしまった。

  Even though he received help, he forgot the kindness.

• 恩おんを忘わすれるような人にん間げんにはなりたくない。

  I don't want to become a person who forgets favors.