Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Manx
còmhdaich
←
Middle Irish
*cumtaigid
(inherited(gv/gd))
←
Old Irish
cumtach
(derived(gv/gd))