Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
West Frisian
brief
→
North Frisian
bräif
(cognate)
→
North Frisian
briaf
(cognate)
→
Saterland Frisian
Bräif
(cognate)