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