Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old English
enig
←
Proto-Germanic
*ainagaz
(inherited)
←
Proto-Germanic
*ainaz
(derived)
←
Old Norse
einigr
(cognate)
←
Old Frisian
enich
(cognate)
←
Old Saxon
enig
(cognate)