Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
slicht
←
Proto-Celtic
*slixtus
(inherited)
→
Welsh
llwybr
(cognate)
→
Irish
sliocht
(inherited)
→
Scottish Gaelic
sliochd
(inherited)
→
Manx
sluight
(inherited)