Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Middle High German
klopfen
→
Cimbrian
klopfan
(inherited)
→
German
klopfen
(inherited)
→
Luxembourgish
klappen
(inherited)