Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
eachtar-
←
Proto-Indo-European
*h₁eǵʰs-tero-
(derived)
←
Proto-Indo-European
*h₁eǵʰs
(mention)
→
Irish
eachtardhomhandach
(affix)
→
Irish
eachtarcheallach
(affix)
→
Irish
eachtarmhúrach
(affix)