Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
reacht
→
Irish
bunreacht
(affix)
→
Irish
reachtúil
(suffix)
→
Irish
reachtaigh
(affix)
→
Irish
reachtóir
(affix)
→
Irish
reachtach
(affix)
→
Scottish Gaelic
reachd
(cognate)