Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
West Frisian
kat
←
Proto-Germanic
*kattuz
(inherited)
→
English
cat
(cognate)
→
North Frisian
kåt
(cognate)
→
North Frisian
kaat
(mention)
→
Saterland Frisian
Kat
(cognate)