Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
tol
←
Proto-Indo-European
*telh₂-
(derived)
→
Irish
toil
(inherited)
→
Scottish Gaelic
toil
(inherited)
→
Manx
toill
(inherited)