けっぱなし
tsukeppanashi

Noun

1. leaving (a light, TV, etc.) on; leaving engaged (e.g. a key in a lock)

Usually Written in Kana
Related to っぱなし
エアコンをつけっぱなしにしないで。
eakon'o tsukeppanashini shinaide.
Don't leave the air conditioner on.
Other forms: