Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Portuguese
decente
←
Proto-Indo-European
*deke-
(derived)
←
Proto-Indo-European
*dek-
(mention)
←
Latin
decēns
(derived)
←
Latin
decentis
(mention)
←
Latin
decet
(mention)