Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
dair
←
Proto-Celtic
*daru
(inherited)
←
Ancient Greek
δόρυ
(cognate)
←
Proto-Indo-European
*dóru
(inherited)
←
Old Irish
daur
(mention)
→
Irish
dair
(inherited)
→
Scottish Gaelic
darach
(inherited)
→
Manx
darragh
(derived)
→
Old Irish
daire
(mention)
→
Old Irish
derucc
(mention)