Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Irish
deich
←
Proto-Celtic
*dekam
(inherited)
←
Proto-Indo-European
*déḱm̥
(inherited)
←
Old Irish
deich
(inherited)
→
Irish
deachúil
(affix)
→
Irish
deichshiollach
(affix)
→
Manx
jeih
(cognate)
→
Norwegian Nynorsk
ti
(cognate)