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