Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
díth
←
Proto-Indo-European
*dʰew-
(derived)
→
Irish
díoth
(mention)
→
Irish
díothach
(affix)
→
Irish
díothacht
(affix)