Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old English
iergþ
←
Old English
earg
(suffix)
←
Old English
þ
(suffix)
←
Proto-Germanic
*argiþō
(inherited)
←
Old High German
argida
(cognate)