This is the 962nd most frequent Croatian word.
širi
"Širi" means "wider" or "spreads" in English, depending on context.
Here, 'širi' metaphorically means 'to expand' in the context of gaining experience and knowledge.
On širi svoje horizonte putujući u druge zemlje.
He broadens his horizons by traveling to other countries.
In this sentence, 'širi' is the present tense of the verb 'širiti', meaning 'to spread' or 'to diffuse'. It describes the action of spreading a scent.
Vjetar širi miris cvijeća kroz livadu.
The wind spreads the scent of flowers across the meadow.
In this case, 'širi' refers to physically making something wider or larger, specifically the balcony.