This is the 596th most frequent Finnish word.
puhuu
"Speaks" or "is speaking."
The word 'puhuu' is the third person singular present tense of 'puhua', meaning 'to speak'. Here it implies a general ability or habit.
Hän puhuu suomea taitavasti.
He/She speaks Finnish skillfully.
Here, 'puhuu' indicates the act of communication happening during the lecture, providing the main action.
Luennolla opettaja puhuu opiskelijoille.
During the lecture, the teacher speaks to the students.
The word 'puhuu' is used here in an interrogative sentence to inquire about the identity of the person talking at an event.