Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
nocht
←
Proto-Celtic
*noxtos
(inherited)
←
Welsh
noeth
(cognate)
←
Proto-Indo-European
*nogʷós
(derived)
→
Irish
nocht
(inherited)
→
Scottish Gaelic
nochd
(inherited)