Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-West Germanic
*ait(t)rīn
→
English
attern
(inherited)
→
Old English
ætren
(inherited)
→
Middle English
attern
(inherited)