The shell bone script of character of Straight to is
The top is a head of nail, and the bottom is a foot (left). People walk to a nail in a distance straightly, probably to measure the distance estimably.
The bronze script of the character is
The top black spot is the head of nail, the bottom is the foot.
The small seal script of the character is
The nail head becomes a horizontal line, the rest is 止 (foot).
The clerical script of the character is