tread

a step in walking or running

the grooved surface of a pneumatic tire

the part (as of a wheel or shoe) that makes contact with the ground

structural member consisting of the horizontal part of a stair or step

put down or press the foot, place the foot; "For fools rush in where angels fear to tread"; "step on the brake"

tread or stomp heavily or roughly; "The soldiers trampled across the fields"

crush as if by treading on; "tread grapes to make wine"

brace (an archer's bow) by pressing the foot against the center

apply (the tread) to a tire

mate with; "male birds tread the females"