This is the 635th most frequent Croatian word.
krenuo
"Started" or "set off."
Here, 'krenuo' illustrates the initiation of an activity, specifically learning.
On je krenuo učiti novi jezik.
He has started learning a new language.
The word 'krenuo' here is used to denote the beginning of a journey or movement towards school.
Krenuo sam u školu rano ujutro.
I set off to school early in the morning.
In this sentence, 'krenula' (feminine form) is used metaphorically to describe the beginning of an event, the evening.