Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
reddener
←
English
redden
(affix)
←
English
-er
(affix)
←
Proto-Indo-European
*h₁rewdʰ-
(root)