Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Norse
áttján
←
Old English
eahtatīene
(cognate)
←
Proto-Germanic
*ahtōutehun
(inherited)
←
Old High German
ahtozehan
(cognate)
→
Danish
atten
(derived)
→
Norwegian Bokmål
a
(derived)