Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Portuguese
lũa
←
Proto-Indo-European
*lewksnā
(inherited)
←
Proto-Indo-European
*lewk-
(mention)
←
Latin
lūna
(inherited)
→
Galician
lúa
(inherited)
→
Portuguese
lua
(inherited)