Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Manx
fliaghey
←
Proto-Celtic
*wlikʷos
(derived)
←
Irish
fliuchadh
(cognate)
←
Manx
fliugh
(affix)
←
Manx
-ey
(affix)
←
Old Irish
flechud
(inherited)
←
Old Irish
fliuch
(mention)
→
Manx
sheer-liaghey
(prefix)