Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
French
singulier
←
French
sanglier
(doublet)
←
Latin
singulāris
(borrowed)
→
French
sanglier
(doublet)
→
French
singulièrement
(suffix)
→
Luxembourgish
Singulier
(borrowed)