Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
oighear
←
Old Irish
aig
(inherited)
→
Irish
oighreach
(suffix)
→
Irish
oighearaois
(compound)
→
Irish
oighearchlár
(compound)
→
Irish
oigheareolaíocht
(affix)
→
Irish
oighrigh
(suffix)
→
Scottish Gaelic
eigh
(cognate)
→
Cornish
yey
(cognate)