Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Polish
hełm
←
German
Helm
(borrowed)
←
Proto-Germanic
*helmaz
(derived)
←
Middle High German
helm
(derived)
←
Proto-West Germanic
*helm
(derived)
←
Old High German
helm
(derived)