| Combining Form |
Meaning |
Examples |
| tri- |
three |
triennial/ triumvirate/ trinity |
quadri-
(quadr-) |
four |
quadrilateral/ quadrant/ quadrangle |
| tetra- |
five |
pentagon/ pentameter/ pentagonal |
hexa-
(hex-) |
six |
hexagon/ hexameter/ hexapod |
hepta-
(hept-) |
seven |
heptagon/ heptameter/ heptagonal |
sept-
(septem-/ septi-) |
seven |
septet/ septuagenarian/ septennial |
octo-
(oct-/ octa-) |
eight |
octave/ octet/ octopus |
deca-
(dec-/ dek-/ deka-) |
ten |
decade/ decagram/ decagon |
centi-
(cente-) |
one hundred |
centennial/ centenarian/ centigram |
| kilo- |
one thousand |
kilocycle/ kilometer/ kilowatt |
mill-
(mille-/ milli-) |
one thousand |
mill/ millenium/ millimeter |
| poly- |
many/ more than one |
polytheism/ polysyllable/ polygon |
