Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Scottish Gaelic
còmhdach
←
Irish
cumhdach
(cognate)
←
Manx
coodagh
(cognate)
←
Old Irish
cumtach
(inherited)
→
Manx
coodagh
(cognate)