Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Proto-Celtic
*skʷetlom
→
Welsh
chwedl
(derived)
→
Irish
scéal
(inherited)
→
Scottish Gaelic
sgeul
(inherited)
→
Manx
skeeal
(inherited)
→
Old Irish
scél
(inherited)