Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
gralloch
←
Proto-Celtic
*gre-lach
(derived)
←
Scottish Gaelic
grealach
(derived)
←
Proto-Indo-European
*ǵʰer-
(derived)