Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Cornish
howl
←
Breton
heol
(cognate)
←
Proto-Celtic
*sāwol
(inherited)
←
Welsh
haul
(cognate)
←
Irish
súil
(cognate)
←
Proto-Indo-European
*sóh₂wl̥
(inherited)
→
Welsh
haul
(cognate)
→
Cornish
howlsedhes
(compound)
→
Cornish
howldrehevel
(compound)
→
Cornish
howldrevel
(compound)