Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Breton
tor
←
Barambu
teur
(mention)
←
Proto-Celtic
*torr-V-
(inherited)
←
Proto-Germanic
*þarmaz
(cognate)
←
Ancient Greek
τάμισος
(cognate)
←
Proto-Indo-European
*terh₁-
(inherited)
←
Old Breton
tar
(inherited)
←
Middle Breton
torr
(inherited)