which are small particles of sand.
The character also meant Small or Less. Both Small and Sand shared the same character.
However, the character was used for Small only later on.
So ancient Chinese added Water to the left of the character to make a new character Sand in bronze script:
Also in big seal script
small particle near water are Sand, which is good ideogram character.
Its small seal script is
The clerical script for the character
All left parts are Water, the right parts are Less (or Small).
The current standard script is
Its Pinyin is Sha1.