Top 止 is the foot radical and the entry's filing point — a pictograph of the sole of a foot with toes. It is the leading footstep in the pair of feet that originally made up 步, picturing one step taken before the next.
ideograph
步bù
step; following foot (lower fused body)
The lower three strokes are the trailing foot of the original 步, drawn from a flipped 止. The modern reform tweaked it just enough that it no longer reads as a clean standalone 止 or 少; treat as a stylised second-footprint remnant.
