Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
West Flemish
wok
←
Middle Dutch
ôoc
(inherited)
←
Proto-Germanic
*auk
(inherited)
←
Old Dutch
ōk
(inherited)
←
Old Dutch
ouk
(mention)