triumverate
a group of 3 people in a position of power or authority
uni
one
Bi
two
Duo/Dou/Du
two
Tri / Tres
three
Quad
four
Deci
ten
Centi
one hundred
Bicentennial
two hundred years
decathlon
an athletic contest in which each contestant competes in 10 events
decimate
to wipe out or kill off (originally meaning to kill 1 out of 10, or 10%)
centenary
a 100-year period
Centigrade
A measurement of temperature where water freezes at 0 degrees and boils at 100 degrees.
Quartet
a group of 4 , especially musicians
quatrain
a group of 4 lines of poetry
quadrant
a quarter (1/4) of a circle, or an of the 4 parts of an area divided by two perpendicular lines
