Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Manx
faik
←
Proto-Celtic
*kʷiseti
(inherited)
←
Proto-Indo-European
*kʷeys-
(inherited)
←
Old Irish
·aicci
(inherited)
←
Old Irish
ad·cí
(mention)
→
Scottish Gaelic
faic
(cognate)