This is the 464th most frequent Serbian word.
почео
"Почео" means "started" or "began" in English.
The word "почео" is a past tense verb form meaning 'started,' indicating the initiation of an action (in this case, reading). Its grammatical subject denotes the person who started the action.
Почео сам да читам књигу.
I started reading the book.
Here, "почео" describes the beginning of an occurrence (rainfall), emphasizing its commencement.
Кишу почео падати у зору.
The rain started falling at dawn.
In this instance, "почео" expresses the initiation of an action performed by the subject, the teacher, who starts the lecture on the specified topic.