What is the meaning of Bać?

to be afraid, to fear [with genitive ‘of what’; or with infinitive ‘to do what’]

to be afraid for; to worry, to fret [with o (+ accusative) ‘for what’]

to fear, to be afraid [with genitive ‘of what’ or infinitive ‘to do what’]

to fear, to be afraid for, to worry about something [with o (+ accusative) ‘for what’]

Source: wiktionary.org