Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
Dull
←
Proto-Celtic
*dolā
(derived)
←
Welsh
dôl
(cognate)
←
German
tull
(derived)
←
German
Thiel
(derived)