Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Germanic
*flakuraz
→
Old English
flacor
(derived)
→
German
flackern
(derived)
→
Luxembourgish
flackeren
(derived)
→
Dutch
flikkeren
(derived)