Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
malwod
←
Breton
melc'hwed
(cognate)
←
Breton
melw
(cognate)
←
Proto-Brythonic
*melw-
(inherited)
←
Gaulish
*multon-
(cognate)
←
Proto-Celtic
*meldo-
(derived)
←
Proto-Celtic
*mlido
(mention)
←
Proto-Indo-European
*(h₂)moldus
(derived)
←
Cornish
melhwes
(cognate)
←
Old Welsh
meluet
(inherited)
→
Breton
melc'hwed
(cognate)
→
Welsh
malwota
(affix)
→
Cornish
melhwes
(cognate)
→
Romanian
melc
(cognate)