This is the 69th most frequent Latvian word.
viņi
"They" (masculine or mixed gender).
Here, 'viņi' is used as the subject pronoun referring to a group of people (masculine or mixed gender) who are performing the action of playing.
Viņi spēlē futbolu.
They are playing football.
In this sentence, 'viņi' functions as the subject of the subordinate clause, denoting a third-person masculine or mixed group being observed.
Es redzu, ka viņi nāk uz skolu.
I see that they are coming to school.
Here, 'viņi' is used as a pronoun in the nominative case to identify a group (masculine or mixed) being inquired about.