Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
rhuthro
←
Welsh
rhuthr
(affix)
←
Welsh
-o
(affix)
←
Proto-Indo-European
*h₃rew-
(derived)
←
Middle Irish
rúatharaigid
(cognate)
←
Middle Irish
[[rúathar]], [[rúathur]]
(mention)