Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Manx
dooghys
←
Irish
dúchas
(cognate)
←
Scottish Gaelic
dùthchas
(cognate)
←
Old Irish
dúthchas
(inherited)
→
Irish
dúchas
(cognate)
→
Manx
bun-dooghyssagh
(affix)
→
Manx
dooghyssagh
(affix)
→
Manx
ard-ghooghyssagh
(affix)
→
Manx
ard-ghooghyssaght
(confix)
→
Manx
neughooghyssid
(affix)
→
Manx
aaghooghys
(prefix)