Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Manx
flah
←
Proto-Celtic
*wlatis
(inherited)
←
Irish
flaith
(cognate)
←
Scottish Gaelic
flath
(cognate)
←
Old Irish
flaith
(inherited)