This is the 255th most frequent Italian word.
prova
"Prova" in Italian means "test," "trial," "proof," or "evidence" in English.
In this sentence, 'prova' is used as a noun meaning 'test' or 'trial', referring to an experiment to ensure something functions correctly.
Questa è una prova del sistema di emergenza.
This is a test of the emergency system.
Here 'prova' is the imperative singular form of the verb 'provare', meaning 'to try'. It is used to instruct someone to attempt something.
Prova a risolvere questo problema da solo.
Try to solve this problem on your own.
In this case, 'prove', the plural form of 'prova', is used as a noun meaning 'evidence', referring to factual material that supports a conclusion.