What is the meaning of Skalać?

to befoul, to stain (to make foul; to soil; to contaminate, pollute)

to befoul, to stain (to stain or mar i.e. with words)

to befoul, to stain (to stain or mar i.e. with words) [with instrumental ‘with what’]

to befoul, to stain (to make foul; to soil; to contaminate, pollute) [with instrumental ‘with what’]

Source: wiktionary.org