Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
leath
←
Proto-Celtic
*letos
(inherited)
←
Proto-Celtic
*ɸletos
(inherited)
←
Welsh
lled
(cognate)
←
Cornish
les
(cognate)
←
Latin
latus
(mention)
←
Old Irish
leth
(inherited)
←
Middle Breton
let
(cognate)
←
Middle Breton
led
(mention)
→
Irish
le
(mention)
→
Irish
leathuair
(prefix)
→
Irish
leath-
(mention)
→
Irish
leathré
(prefix)
→
Irish
leithscéal
(prefix)
→
Irish
leathsheoltóir
(prefix)
→
Irish
leatosach
(prefix)
→
Irish
leathóg
(affix)
→
Irish
idirleath
(affix)
→
Irish
leathbhliantúil
(prefix)
→
Irish
leathchéad
(prefix)
→
Irish
broncaileathóir
(affix)
→
Scottish Gaelic
le
(cognate)