Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
casúr
←
French
casseur
(cognate)
←
Scottish Gaelic
casar
(cognate)
←
Manx
casoor
(cognate)
←
Latin
quassō
(derived)
→
Irish
casúirín
(affix)