Joined with the ending of 'Circle' = 'cle'.
Thus: Pentacle. A Pentagram is
a Five Pointed Star representing the four
basic elements which make up everything
contained in our world, with the top point
representing our own 'Spirit' followed by Air,
Water, Earth & Fire ... All the things contained
in our World joined in a Never-ending Cycle.
By adding the Circle around these Elements
you make a Pentacle. The Pentacle is
a Symbol of Protection. Life goes on.