Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Middle English
wough
←
Old English
wōh
(inherited)
←
Proto-Germanic
*wanhaz
(derived)
→
English
waw
(mention)
→
English
wo
(inherited)
→
English
wough
(inherited)