Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Scottish Gaelic
dùisg
←
Irish
dúisigh
(cognate)
←
Middle Irish
dúiscid
(inherited)
←
Old Irish
do·díuschi
(inherited)
→
Irish
dúisigh
(cognate)
→
Scottish Gaelic
ath-dhùisg
(prefix)
→
Manx
dooisht
(cognate)