This is the 6442nd most frequent Japanese word.
ストッパー
"ストッパー" means "stopper" or "a device or object that prevents movement or keeps something in place."
Here, 'ストッパー' refers to a physical device used to keep a door stationary, like a doorstop.
彼はドアのストッパーを外して、ドアを開けた。
He removed the doorstop and opened the door.
In this context, 'ストッパー' is used metaphorically to mean something or someone that halts or resolves an issue.
彼の素早い反応が問題のストッパーとなった。
His quick response acted as a stopper to the issue.
Here, 'ストッパー' signifies a device used to seal the opening of a bottle or container.