някой

Determiner

 * 1) some

Pronoun

 * 1) someone, something

Usage notes
The accusative and (archaically) the dative forms are used only when ня́кой serves as a pronoun, not as a determiner modifying another noun. In informal Bulgarian the nominative form is often used instead of the accusative and prepositional ones (Ня́кой ви́ждам, с ня́кой разгова́рям). This usage is not considered standard.