捨すてて置おく

godan verb (-ku)

leave as is; abandon without further action

Literally 'throw away and leave'; used when someone deliberately leaves something alone, often with a nuance of neglect or washing one's hands of it.

• 壊こわれた自じ転てん車しゃをそのまま捨すてて置おいた。

  I left the broken bicycle as it was.

• 彼かれは問もん題だいを捨すてて置おいて、何なにも解かい決けつしなかった。

  He left the problem alone and solved nothing.