Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Spanish
ofuscar
←
Italian
offuscare
(cognate)
←
Latin
obfuscō
(mention)
←
Latin
ob-
(derived)
←
Latin
fuscō
(mention)