Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
arduous
←
Irish
ard
(mention)
←
Proto-Indo-European
*h₃er-
(root)
←
Latin
arduus
(mention)
→
English
arduously
(suffix)
→
English
arduousness
(suffix)
→
English
unarduous
(prefix)