〜っぱなし means "left in a state" or "keep doing without stopping." Usually implies negligence or something problematic.
Left unchanged - Something left open, on, etc.
Continuous state - Doing something non-stop
Don''t leave the door open.
Usually negative — implies someone should have done something but didn''t.
Formation: Verb ます-stem + っぱなし
- 開けます → 開けっぱなし
- 出します → 出しっぱなし
Usually negative connotation — carelessness, negligence
Often followed by にする — 開けっぱなしにする
I fell asleep with the TV left on.
Don't leave the water running!
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