Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Manx
caair
←
Welsh
cadair
(cognate)
←
Ancient Greek
καθέδρα
(derived)
←
Cornish
kador
(cognate)
←
Latin
cathēdra
(derived)
←
Old Irish
cathaír
(inherited)