Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Scottish Gaelic
deoghail
←
Proto-Celtic
*delu-
(inherited)
←
Irish
diuilim
(cognate)
←
Irish
deolaim
(mention)
←
Scottish Gaelic
deoc
(link)
←
Proto-Indo-European
*dʰeh₁(y)-
(derived)
→
Old English
delu
(cognate)