Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Manx
jeeagh
←
Irish
féach
(cognate)
←
Middle Irish
déchaid
(inherited)
←
Old Irish
fégaid
(derived)
←
Old Irish
do·éccai
(mention)