Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
cloch
←
Proto-Celtic
*klukā
(inherited)
→
Irish
cloch
(inherited)
→
Irish
cloigeann
(mention)
→
Irish
clochar
(mention)
→
Scottish Gaelic
clach
(inherited)
→
Manx
clagh
(inherited)
→
Old Irish
cloicenn
(compound)
→
Old Irish
clochamail
(suffix)