Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old English
þan
←
Proto-Germanic
*þainaz
(inherited)
←
Proto-Indo-European
*teh₂-
(derived)
→
English
thone
(inherited)
→
Faroese
tá
(cognate)