Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
syth
←
Proto-Celtic
*sizdos
(inherited)
←
Proto-Indo-European
*sísdeti
(inherited)
←
Latin
sīdō
(cognate)
←
Middle Irish
seta
(cognate)