Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Albanian
lluke
←
Welsh
llug
(cognate)
←
Ancient Greek
λευκός
(cognate)
←
Proto-Indo-European
*lewk-
(inherited)
←
Latin
lux
(cognate)
←
Lithuanian
laũkas
(cognate)
←
Old Norse
ljos
(cognate)