性しょう懲こりもなく

expression, adverb

without learning one's lesson; doggedly; in spite of past failures

Used when someone repeats the same mistake or undesirable behavior despite previous bad experiences. Often carries a critical or exasperated tone.

See also: 性懲りもない

• 彼かれは性しょう懲こりもなくまた同おなじ失しっ敗ぱいを繰くり返かえした。

  He doggedly repeated the same mistake without having learned his lesson.

• 性しょう懲こりもなくギャンブルに手てを出だすなんて、呆あきれてものも言いえない。

  I'm speechless that you'd turn to gambling again in spite of your past experiences.