This is the 19th most frequent Estonian word.
kus
"Where."
Used as an interrogative adverb to ask about location.
Kus sa elad?
Where do you live?
Used as a relative pronoun to introduce a subordinate clause describing location.
Ma tean kohta, kus saab hästi süüa.
I know a place where one can eat well.
Functions as a relative adverb to refer to a location visited in the past.