proširiti

1. to widen; to broaden
   Opština je konačno proširila put do sela. — The municipality finally widened the road to the village.
2. to expand; to enlarge
   Firma je prošle godine proširila poslovanje na Hrvatsku. — Last year the company expanded its business to Croatia.
   Na kursu sam proširio svoj rečnik. — I expanded my vocabulary on the course.
3. (of news, rumours) to spread
   Neko je proširio glasinu da se škola zatvara. — Someone spread a rumour that the school was closing.
4. (proširiti se) to spread
   Požar se brzo proširio na susednu kuću. — The fire quickly spread to the neighbouring house.

Spreading to something takes na + acc.: proširiti se na ceo grad.