Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
German
ehern
←
Proto-Germanic
*aiz
(inherited)
←
Middle High German
(inherited)
←
Old High German
ēr
(inherited)
→
English
ore
(cognate)
→
Old English
ar
(cognate)
→
Norwegian Nynorsk
eir
(cognate)