proširivati

1. to widen; to broaden
   Grad proširuje ulicu pored pijace. — The city is widening the street next to the market.
2. to expand; to extend; to enlarge
   Firma proširuje poslovanje na ceo region. — The company is expanding its business across the region.
   Stalno proširujem svoje znanje engleskog. — I keep expanding my knowledge of English.
3. (proširivati se) to spread; to expand
   Vatra se brzo proširivala prema šumi. — The fire was quickly spreading towards the forest.

The perfective is proširiti.