걸음, 발걸음
an act or movement of putting one leg or foot in front of the other in walking or running
계단, 발판
a flat surface, especially one in a series, on which to place one's foot when going up or down
단계, 조치
a measure or stage in a process or series
걷다, 발을 내딛다
lift one's foot and put it down in a different place, as in walking