Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Scottish Gaelic
tairgse
←
Middle Irish
taircsiu
(inherited)
←
Middle Irish
taircid
(mention)
←
Old Irish
do·fairget
(cognate)