Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
opportune
←
Old French
opportun
(derived)
←
Proto-Indo-European
*per- (fare)
(root)
←
Latin
opportunus
(derived)
→
English
opportunity
(suffix)
→
English
inopportune
(prefix)
→
English
opportunely
(suffix)
→
English
opportuneness
(suffix)
→
English
unopportune
(prefix)