Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
leithscéal
←
Irish
leath
(prefix)
←
Irish
scéal
(prefix)
←
Proto-Indo-European
*sekʷ-
(root)
←
Old Irish
leithscél
(inherited)
→
Irish
leithscéalach
(suffix)
→
Manx
leshtal
(cognate)