Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Luxembourgish
Staf
←
German
Stab
(cognate)
←
English
staff
(cognate)
←
Proto-Germanic
*stabaz
(derived)
←
Old High German
stab
(derived)
←
Icelandic
stafur
(cognate)
←
Dutch
staf
(cognate)