Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Scottish Gaelic
òganach
←
Scottish Gaelic
-ach
(affix)
←
Middle Irish
ógán
(derived)
←
Old Irish
ócán
(derived)
←
Old Irish
óc
(mention)