Spine with fluid (hieroglyph)

The use of the spine with fluid hieroglyph is for words showing "length", as opposed to 'breadth', (Egyptian usekh-(breadth, width)-for example, the Usekh collar). Some example words for 'length' are: to be long, length, to extend, extended; and for to expand, to dilate, words like: joy, gladness, pleasure, delight.