Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old English
hrēþ
→
Old English
hreþmonaþ
(compound)
→
Old English
sigehreþig
(affix)
→
Old English
hreþig
(affix)