Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
ceird
←
Proto-Celtic
*kerdā
(derived)
←
Proto-Indo-European
*kerd-
(mention)
←
Old Irish
cerd
(inherited)
→
Irish
lámhcheird
(affix)
→
Irish
ceardchumann
(affix)
→
Manx
keird
(cognate)