Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old English
sweostorsunu
←
Old English
sweostor
(compound)
←
Old English
sunu
(compound)
←
Icelandic
systursonur
(cognate)
←
Swedish
systerson
(cognate)