Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Faroese
pennur
←
Faroese
fjøður
(cognate)
←
Proto-Indo-European
*péth₂r̥
(derived)
←
Proto-Indo-European
*peth₂-
(mention)
←
Proto-Italic
*petnā
(derived)
←
Latin
penna
(derived)
←
Old Norse
penni
(derived)