Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old High German
wahtari
←
Proto-Germanic
*wahtwō
(derived)
←
Old High German
wahta
(suffix)
←
Old High German
āri
(suffix)
→
Luxembourgish
Wiechter
(inherited)