Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
laigid
←
Proto-Celtic
*legeti
(inherited)
←
Proto-Indo-European
*legʰ-
(root)
←
Proto-Indo-European
*legʰ-
(inherited)
→
Irish
luigh
(inherited)
→
Scottish Gaelic
laigh
(inherited)
→
Manx
lhie
(inherited)
→
Middle Irish
lennán
(cognate)
→
Old Irish
foálgi
(prefix)
→
Old Irish
saigid
(mention)
→
Old Irish
saidid
(mention)