付つけ入いる

godan verb (-ru), intransitive verb

take advantage of; impose on

Used when someone exploits another person's weakness, carelessness, or goodwill, often in a negative sense. Commonly appears as 付け入る隙 (a chance to take advantage).

• 彼かれは人ひとの弱よわみに付つけ入いるのがうまい。

  He is good at taking advantage of people's weaknesses.

• 相あい手ての親しん切せつに付つけ入いってはいけない。

  You must not impose on someone's kindness.