Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
earr
←
German
Arsch
(cognate)
←
English
arse
(cognate)
←
Proto-Indo-European
*h₃érsos
(inherited)
←
Old Irish
err
(inherited)
→
Irish
earrbhán
(affix)