Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Saterland Frisian
Oue
←
German
Aue
(cognate)
←
West Frisian
ei
(cognate)
←
Proto-West Germanic
*awi
(inherited)
←
Old Frisian
ei
(inherited)