Leaving something as-is with

Grammar: Condition » 〜っぱなし

っぱなし is appended to a verb stem to show that something has been left in the state or condition from that action, with a negative connotation to leaving it as such.

ぱなし comes from the verb (はな)す.

Usage Notes

〜っぱなし criticizes an unattended state. The focus stays on the state after the action.

Further Reading

Examples

Leaving the futon out with 〜っぱなし

Learn the meaning and usage of the grammar 〜っぱなし in Japanese, with examples from manga.
よつばと! » Volume 9 » Page 143

Yotsuba invites her neighbors over for coffee. She first gives the three a tour of the house, leading up to the kitchen.

風香(ふうか):
(あら)(もの)がたまってるのが()になる…」
“It bothers me that these dishes are piled up...”
あさぎ:
(わたし)廊下(ろうか)のスミにホコリがたまってるのが()になる」
“What bothers me is the dust built up in the hallway.”
恵那(えな):
「おふとんだしっぱなし()になる」
“It bothers me that the futon is left laying out.”