Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
llath
←
Irish
slat
(cognate)
←
Cornish
lath
(cognate)
→
English
lath
(cognate)
→
Welsh
hudlath
(compound)
→
Irish
slat
(cognate)