Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
North Frisian
teenk
←
Proto-Germanic
*þankijaną
(derived)
←
Proto-Indo-European
*teng-
(derived)
←
Old Frisian
thenka
(derived)
→
English
think
(cognate)