This is the 43rd most frequent Slovenian word.
kako
"Kako" means "how" in English.
Here, 'kako' is part of a dependent clause to express uncertainty about the manner of conducting an action.
Govoril je tako hitro, da nisem vedel, kako naj ga ustavim.
He spoke so quickly that I didn't know how to stop him.
Here, 'kako' is used as an interrogative adverb to ask about the manner or state of being.
Kako si danes?
How are you today?
In this context, 'kako' introduces a subordinate clause that explains the manner in which an action is performed.