This is the 580th most frequent Finnish word.
ketään
"Ketään" means "anyone" or "anybody" in the partitive case.
The word 'ketään' is used in the partitive case to signify 'anyone' in a negative sentence, paired with the verb 'nähdä' (to see).
En nähnyt ketään kadulla.
I didn't see anyone on the street.
Here, 'ketään' is again in the partitive form and is used to represent 'anyone' as the object of a negative imperative directed action.
Ole kiltti äläkä huuda ketään.
Please don't shout at anyone.
In this question form, 'ketään' means 'anyone', used in the partitive to inquire about the existence of people.