Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
selsig
←
Breton
silzic
(cognate)
←
Proto-Brythonic
*selsig
(inherited)
←
English
sausage
(cognate)
←
Cornish
selsik
(cognate)
←
Latin
salsus
(derived)
←
Old Welsh
selsic
(inherited)
←
Middle Welsh
selsig
(inherited)