Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Portuguese
ictio-
←
Ancient Greek
ἰχθύς
(derived)
→
Portuguese
ictiólogo
(affix)
→
Portuguese
ictiologia
(affix)
→
Portuguese
ictiose
(affix)
→
Portuguese
ictiossauro
(affix)
→
Portuguese
ictiofagia
(affix)