GRE : Essential Greek Roots: Deca-

decagon
noun
a polygon having ten angles and ten sides
decalogue
noun
biblical commandments of Moses
decameron
noun
collection of 100 tales by Boccaccio told over ten days
decameter
noun
unit of length equal to 10 meters or 32.8 feet
decapod
noun
crustacean of the order Decapoda, having five pairs of legs
decasyllable
noun
a word or line of verse of ten syllables
decimal
adjective
pertaining to tenths or to the number 10
decimate
verb (used with
to select by lot and kill every tenth person
demagogue
noun
orator or political leader who arouses the emotions and prejudices of the people
democracy
noun
government in which people participate