na-adjective, noun
left open; left ajar
Describes a door, window, or container that has been left open, often carelessly or continuously.
ドアが開けっ放しになっている。
The door has been left open.
窓を開けっ放しで寝てしまった。
I fell asleep with the window left open.
na-adjective, noun
Describes a person who speaks their mind without reserve; often implies a lack of restraint in speech.
彼は開けっ放しな性格で、思ったことをすぐ口にする。
He has an outspoken personality and immediately says what he thinks.
あの人は開けっ放しだから、時々失礼に聞こえる。
That person is so frank that they sometimes sound rude.