Unus, -a, -um
one
Duo, duae, duo
two
tres, tres, tria
three
quattor
four
quinque
five
sex
six
septem
seven
octo
eight
novem
nine
decem
ten
undecem
eleven
duodecim
twelve
tredecim
thirteen
quattordecim
fourteen
quindecim
fifteen
sedecim
sixteen
septendecim
seventeen
duodeviginti
eighteen
undeviginti
nineteen
viginti
twenty
primus, -a, -um
first
secundus, -a, -um
second
tertius, -a, -um
third
quartus, -a, -um
fourth
quintus, -a, -um
fifth
sextus, -a, -um
sixth
septimus, -a, -um
seventh
octavus, -a, -um
eighth
nonus, -a, -um
ninth
decimus, -a, -um
tenth