Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
West Frisian
dekke
←
Proto-West Germanic
*þakkjan
(inherited)
←
Old Frisian
thekka
(inherited)
→
English
thatch
(cognate)
→
German
decken
(cognate)