Latin numbers in English words

Cardinal ordinal English key element
1 unus  primus one un/prim
2 duo  secundus/alter two duo/alter
3 tres  tertius three tre/tert
4 quattor  quartus four quat/quart
5 quinque  quintus five quin
6 sex  sextus six sex
7 septem  septimus seven sept
8 octo  octavus eight oct
9 novem  nonus nine nov/non
10 decem  decimus ten dec
100 centum  centesimus hundred cent
1000 mille  millesimus thousand mille