Amazing Chinese Characters (799) Speed - 速

The bronze script of character Speed is 

the script is slanted, I don't know why. The down left is 

Road + Foot, means walking or moving related action.
 

The up right is character Bind (Post 397).

When people want to walk fast, they bind or tie their clothes, shoes, and the stuffs they carry. 

The big seal script of character Speed is

The left is same as I mentioned above: Road + Foot, waking or moving. The right is character Bind.

The small seal script of character Speed is

The left is Road + Foot, some change. The right is character Bind. 
 

The clerical script of character Speed is

The left is called Walk Bottom Radical, simplified from older "Road +Foot". The right is character Bind.

The song typeface of character Speed is 

Similar to clerical script.

The pinyin of character Speed is Su4.