Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
pleth
←
Latin
*pletta
(borrowed)
←
Latin
plecta
(mention)
←
Latin
plecto
(mention)
→
Welsh
cymhleth
(affix)
→
Welsh
penbleth
(affix)
→
Welsh
plethdorch
(affix)
→
Welsh
plethwaith
(affix)
→
Welsh
plethu
(affix)