Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
hiraeth
←
Breton
hiraezh
(cognate)
←
Proto-Brythonic
*hiraɨθ
(inherited)
←
Gaulish
siraxta
(mention)
←
Proto-Celtic
*sīraxto-
(inherited)
←
Cornish
hireth
(cognate)
←
Old Irish
sírecht
(cognate)
→
Welsh
hir
(link)