bi, du
two
bicycle
a vehicle with two wheels
tri
three
trisect
To divide into three parts
quad/quar
four
quarter
to provide or pay for housing
penta, quint
five
quintuplets
5 children born at the same time
sex, hexa
six
sextuplet
one of six babies born at one birth
sept
seven
september
the ninth month of the year, formerly the seventh