Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Old Irish
menmae
←
Proto-Celtic
*menmans
(inherited)
←
Proto-Celtic
*menman
(mention)
←
Proto-Indo-European
*men-
(root)
←
Proto-Indo-European
*men-
(derived)
→
Old English
gemynd
(cognate)
→
Irish
meanma
(inherited)
→
Scottish Gaelic
meanmna
(inherited)