This is the 60th most frequent Finnish word.
he
"They" (third-person plural pronoun).
Here, 'he' functions as a personal pronoun referring to a group of people.
He ovat ystäviä.
They are friends.
In this case, 'he' again serves as a personal pronoun indicating those who are departing.
He voivat lähteä nyt.
They can leave now.
Once more, 'he' is used as a personal pronoun to specify the individuals who enjoy coffee.