Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Scottish Gaelic
annainn
←
Irish
ionainn
(cognate)
←
Manx
aynin
(cognate)
←
Old Irish
indiunn
(inherited)