Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
bemourn
←
Old English
bemurnan
(inherited)
←
English
be
(prefix)
←
English
mourn
(prefix)
←
Middle English
bemornen
(inherited)
←
Old Saxon
bimornian
(cognate)