Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
accuis
←
Welsh
achos
(cognate)
←
Latin
occāsiō
(derived)
←
Middle Welsh
achaws
(cognate)
→
Irish
aicis
(inherited)
→
Old Irish
fu acis
(mention)
→
Middle Welsh
achaws
(cognate)