Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Breton
meur
←
Proto-Brythonic
*mọr
(inherited)
←
Proto-Celtic
*māros
(inherited)
←
Proto-Indo-European
*moh₁ros
(inherited)
←
Proto-Indo-European
*meh₁-
(mention)
→
Breton
skol-veur
(compound)
→
Irish
mór
(cognate)
→
Scottish Gaelic
mòr
(cognate)