Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
áireamh
←
Old Irish
árem
(inherited)
→
Irish
mí-áireamh
(affix)
→
Irish
móráireamh
(affix)
→
Irish
comhair
(affix)
→
Irish
comhaireamh
(affix)
→
Scottish Gaelic
àireamh
(cognate)
→
Manx
earroo
(cognate)