This is the 982nd most frequent Croatian word.
baviti
To engage in, occupy oneself with, or deal with.
In this sentence, 'baviti se' is used in its basic form meaning to engage in or to practice an activity.
Bavim se sportom svako jutro.
I engage in sports every morning.
The verb 'baviti se' is applied to denote participation in a meaningful or professional context.
Oni se bave humanitarnim radom.
They are involved in humanitarian work.
'Baviti se' here indicates involvement or interest in a particular activity or field.