Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Portuguese
comum
←
Proto-Indo-European
*ko-moin-i
(derived)
←
Latin
commūnis
(inherited)
→
Portuguese
comunismo
(affix)
→
Portuguese
senso comum
(mention)
→
Portuguese
comumente
(suffix)
→
Portuguese
incomum
(prefix)