1. The first meaning of the word "Cefn" is, "the back;" _e.g._ "Cefn dyn,"
"the back of a man."
2. It also signifies "the upper part of the ridge of some elevated and
exposed land." As a prefix, its meaning depends upon the fact whether the
word attached to it be an adjective or a substantive. If an adjective be
attached, it has the _second_ signification; _i.e._ it is the upper part of
some exposed land, having the particular quality involved in the adjective,
such as, "Cefndu," "Cefngwyn," "Cefncoch," the black, white, or red
headland.
When a substantive is attached, it has the _first_ signification; _i.e._ it
is the _back_ of the thing signified by the substantive; such as,
"Cefnllys," the back of the court.