pomoćni

1. auxiliary; supplementary
   Glagol „biti“ je pomoćni glagol u srpskom. — The verb 'biti' is an auxiliary verb in Serbian.
   Uđite na pomoćni ulaz, glavni je zatvoren. — Use the side entrance, the main one is closed.
2. (of a person, position) assistant
   Radio je kao pomoćni radnik na gradilištu. — He worked as a laborer on a construction site.
   Novi pomoćni trener stiže sledeće nedelje. — The new assistant coach arrives next week.