Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
loing
←
Old English
lūcan
(cognate)
←
Proto-Celtic
*lungeti
(derived)
←
Proto-Celtic
(mention)
←
Welsh
ellwng
(cognate)
←
Welsh
dillwng
(mention)
←
Proto-Indo-European
*lewg-
(root)
←
Proto-Indo-European
*lewg-
(derived)
←
Latin
luctor
(cognate)