Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
léir
←
Proto-Celtic
*lēris
(inherited)
→
Welsh
llwyr
(cognate)
→
Irish
léir
(inherited)
→
Scottish Gaelic
lèir
(inherited)