Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Latin
opportūnus
→
Catalan
oportú
(derived)
→
Danish
opportun
(derived)
→
Spanish
oportuno
(derived)
→
French
opportun
(derived)
→
Galician
oportuno
(derived)
→
Italian
opportuno
(derived)
→
Latin
opportunitas
(suffix)
→
Latin
inopportunus
(affix)
→
Portuguese
oportuno
(derived)