This is the 275th most frequent Bulgarian word.
какво
"What."
'Какво' is used here as an interrogative word to ask about the object of the action.
Какво четеш в момента?
What are you reading right now?
'Какво' functions as a relative pronoun introducing a subordinate clause indicating the content of the uncertainty.
Той не знае какво да прави.
He doesn’t know what to do.
'Какво' is used to introduce a subordinate clause inquiring about the content or subject of interest.