Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Welsh
cryd
←
Proto-Celtic
*kritos
(derived)
←
Old Welsh
crit
(inherited)
←
Old Irish
crith
(cognate)
←
Middle Welsh
crid
(inherited)
→
Old English
hriþ
(cognate)
→
Welsh
echryd
(affix)
→
Old Irish
crith
(cognate)