Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
capall
←
Gaulish
(cognate)
←
Welsh
ceffyl
(cognate)
←
Ancient Greek
καβάλλης
(cognate)
←
Latin
*cappillus
(borrowed)
←
Latin
caballus
(mention)
←
Latin
capellus
(mention)
←
Latin
caballus
(mention)
←
Undetermined
*pp
(mention)
→
Irish
capall
(inherited)
→
Scottish Gaelic
capall
(inherited)
→
Manx
cabbyl
(inherited)
→
Icelandic
kapall
(derived)