if something proves dangerous, expensive, etc. or if it proves to be dangerous, etc., you discover that it is dangerous, etc. over a period of time
ثابت شدن, آشکار شدن, روشن شدن
The strategy has proved successful.
The new system has proved popular with our clients.
It was proving extremely difficult to establish the truth.
I have some information that may prove useful.
The opposition proved too strong for him.
The play proved a great success.
Shares in the industry proved a poor investment.
His lack of experience may prove a problem in a crisis.
The promotion proved to be a turning point in his career.
Their fears proved to be groundless.
synonym turn out(1)