Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Dutch
*ōm
→
Afrikaans
oom
(inherited)
→
Middle Dutch
oom
(inherited)
→
Indonesian
om
(derived)
→
Dutch
oom
(inherited)