Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
cnau
←
Proto-Brythonic
*know
(inherited)
←
Proto-Celtic
*knūs
(inherited)
←
English
nut
(cognate)
←
Proto-Indo-European
*knew-
(inherited)
←
Latin
nux
(cognate)
→
Welsh
cneuen
(affix)
→
Welsh
cnewyll
(mention)
→
Welsh
cneua
(affix)
→
Irish
cnó
(cognate)
→
Scottish Gaelic
cnò
(cognate)
→
Manx
cro
(cognate)