Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Latin
splendeo
←
Proto-Indo-European
*spln̥d-eh₁-
(derived)
←
Old Cornish
spla(d)n
(cognate)
←
Old Irish
sluindid
(cognate)
→
Old Armenian
փայլ
(cognate)