Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Scottish Gaelic
toit
←
Irish
toit
(cognate)
←
Middle Irish
tútt
(derived)
→
Irish
toit
(cognate)
→
Scottish Gaelic
toitean
(suffix)
→
Scottish Gaelic
toiteag
(suffix)