Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
mam
←
Proto-Brythonic
*mamm
(inherited)
←
Proto-Celtic
*mammā
(inherited)
←
Proto-Celtic
*mātīr
(cognate)
←
Middle Welsh
mam
(inherited)
→
Middle Armenian
մամ
(cognate)
→
Welsh
mamau
(affix)
→
Welsh
mam-gu
(compound)
→
Welsh
llysfam
(prefix)