Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
tuath
←
Proto-Celtic
*toutā
(inherited)
←
Proto-Indo-European
*tewtéh₂
(inherited)
←
Old Irish
túath
(inherited)
→
Persian
توده
(cognate)
→
Irish
tuathánach
(affix)