Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
West Frisian
wurde
←
Old Frisian
wertha
(inherited)
→
Luxembourgish
wäerten
(cognate)
→
Saterland Frisian
wäide
(cognate)