This is the 41st most frequent Italian word.
perché
"Perché" means "why" or "because" in English, depending on context.
Here, "perché" is used as an interrogative adverb to ask for the reason or purpose of an action.
Perché vuoi imparare l'italiano?
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In this example, "perché" serves as a conjunction introducing a causal subordinate clause explaining the reason for the main clause.
Non sono andata al cinema perché ero stanca.
I didn't go to the cinema because I was tired.
The word "perché" is used as a causative conjunction specifying the reason behind the situation described in the main clause.