This is the 3943rd most frequent Japanese word.
シャッター
"シャッター" means "shutter" (e.g., camera shutter or roll-up shutter).
This usage refers to the shutter mechanism in a camera, showcasing its functional operation.
カメラのシャッターを押して写真を撮りました。
I pressed the camera shutter and took a photo.
Here, 'シャッター' is used to describe physical shutters typically found on stores, indicating their closed state as a barrier.
お店のシャッターが閉まっていて入れませんでした。
The store's shutters were closed, and I couldn't enter.
In this case, 'シャッター' refers to the adjustable shutter speed of a camera, affecting the motion capture in photography.