Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Manx
niau
←
Proto-Celtic
*nemos
(inherited)
←
Proto-Indo-European
*nébʰos
(inherited)
←
Old Irish
nem
(inherited)
→
Scottish Gaelic
nèamh
(cognate)
→
Manx
ard-niau
(affix)