Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
North Frisian
suart
←
North Frisian
suurt
(cognate)
←
West Frisian
swart
(cognate)
←
Proto-Germanic
*swartaz
(inherited)
←
Old Frisian
swart
(inherited)