As the sun settles in the west birds roost in their nests; so
a cross-hatched bird's nest provided the cradle for "west", and nest became
Man's fertile imagination conceived a new ideograph -- a nest with a
brooding bird :
hatching up a new form :
which finally developed into a full-fledged character for west :.
As all "things" exist between east
the combination east-west, meaning "things", came to be applied to anything
from east to west.