Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
dodcadchae
←
Proto-Celtic
*tonketos
(derived)
←
Welsh
tynged
(cognate)
←
Proto-Indo-European
*tenk-
(root)
←
Proto-Indo-European
*tenk-
(derived)
←
Old Irish
dodcadach
(affix)
←
Old Irish
-e
(affix)
←
Old Irish
dodcad
(mention)
←
Old Irish
-ach
(mention)
←
Old Irish
do-
(mention)
←
Old Irish
tocad
(mention)