Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
brothren
←
English
brother
(affix)
←
English
-en
(affix)
←
English
brethren
(mention)
←
Middle English
brotheren
(inherited)
←
Middle English
brothren
(mention)