Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Romansch
flum
←
Proto-Indo-European
*bʰlew-
(derived)
←
Latin
flūmen
(inherited)
←
Latin
fluo
(mention)
→
Friulian
flum
(cognate)