Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old English
edor
←
Proto-Germanic
*edaraz
(inherited)
←
Old High German
etar
(cognate)
←
Icelandic
jaðar
(cognate)
→
English
edder
(mention)