Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
cruinn
←
Proto-Celtic
*krundis
(inherited)
←
Welsh
crwn
(cognate)
←
Old Irish
cruind
(inherited)
→
Irish
cruinne
(mention)
→
Irish
míchruinn
(affix)
→
Irish
cruinnigh
(affix)
→
Irish
cruinnmheá
(affix)
→
Irish
cruinnteach
(affix)
→
Irish
cruinnmheall
(affix)