Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
North Frisian
naas
←
Proto-Germanic
*nasō
(inherited)
←
Old Frisian
*nase
(inherited)
→
Luxembourgish
Nues
(cognate)