Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Portuguese
dificuldade
←
Proto-Indo-European
*dʰeh₁-
(mention)
←
Latin
difficultās
(mention)
←
Latin
difficilis
(mention)
←
Latin
facilis
(mention)
←
Latin
faciō
(mention)