to make an inroad; to take or assume (power, a position, property, rights, etc.) and hold in possession by force or without right; to usurp; to encroach upon.

to diffuse through the whole of; to pervade.

to go beyond (a limit, boundary, etc.); to transgress.

to break (a law, rule, etc.); to violate.

to step; to tread.

to make a sound or sounds; to sound.

(sound) to be made.