This is the 879th most frequent Slovenian word.
začnejo
The Slovenian word "začnejo" means "they start" or "they begin" in English.
'Začnejo' serves as the verb indicating the starting of the action (singing) performed by the children upon the stimuli of hearing music.
Otroci začnejo peti, ko zaslišijo glasbo.
The children start singing when they hear the music.
The word 'začnejo' is used here as a verb in the present tense, representing an action that people begin to perform.
Ko začne deževati, ljudje začnejo iskati zavetje.
When it starts to rain, people begin looking for shelter.
Here, 'začnejo' is employed to depict the commencement of a repetitive, seasonal action by the birds.