What does -nik mean?

-nik meaning in Etymology Dictionary

as with beatnik, etc., suffix used in word formation from c.1945, from Yiddish -nik (like in nudnik "a bore"), from Russian -nik, typical private suffix definition "person or thing associated with or involved with" (compare nudnik; kolkhoznik "member of a kolkhoz"). Rocketed to popularity with sputnik (q.v.).