This is the 231st most frequent Czech word.
proč
"Proč" means "why" in English.
In this sentence, 'proč' is used to form a standard informational question asking for the reason behind an action.
Proč chceš jít ven?
Why do you want to go outside?
Here, 'proč' introduces a dependent clause to provide the reasoning or cause behind an action mentioned.
Nevím, proč jsi to udělal.
I don't know why you did that.
In this example, 'proč' appears as part of an indirect question or explanation embedded within the statement.