Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
tracht
←
Proto-Celtic
*traxtus
(inherited)
←
Welsh
traeth
(cognate)
←
Latin
tractus
(cognate)
→
Irish
trácht
(inherited)