Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
arcana
←
Proto-Indo-European
*h₂erk-
(root)
←
Latin
arcānus
(derived)
←
Latin
arceo
(mention)
←
Latin
arca
(mention)
→
Finnish
arkana
(derived)