Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old English
undergan
←
Old English
under
(prefix)
←
Old English
gan
(prefix)
←
Old Saxon
undargan
(cognate)
←
Old Saxon
undargangan
(mention)