Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
French
trente
←
Old French
trente
(inherited)
←
Proto-Indo-European
*tri(d)ḱomt
(inherited)
←
Latin
trīgintā
(inherited)
→
French
trentaine
(suffix)
→
French
trentième
(suffix)