Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
dís
←
Scottish Gaelic
dithis
(cognate)
←
Manx
jees
(cognate)
←
Old Irish
dïas
(inherited)
→
Irish
leictreondís
(compound)