Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Scottish Gaelic
cac
←
Scottish Gaelic
poll-caca
(link)
←
Old Irish
cacc
(inherited)
←
Old Irish
caccaid
(inherited)
←
Old Irish
cacc
(mention)
→
English
caca
(cognate)