Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
réidid
←
Proto-Celtic
*rēdeti
(inherited)
←
Proto-Germanic
*rīdaną
(cognate)
→
Irish
réim
(mention)
→
Scottish Gaelic
rèite
(derived)