not closely, not tightly
Крышка неплотно прилегала, и вода вытекала.
The lid was not tightly closed, and water was leaking out.
Дверь была закрыта неплотно.
The door was not fully closed.
Он неплотно завернул крышку банки.
He didn't screw the jar lid on tightly.
Окно закрыли неплотно, и дуло ветром.
The window was not closed tightly, and a draft was coming in.
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