Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
optional
←
English
option
(suffix)
←
English
al
(suffix)
→
English
optionally
(suffix)
→
English
optionality
(suffix)
→
English
nonoptional
(prefix)
→
English
optionalize
(suffix)
→
English
non-optional
(affix)
→
Italian
optional
(borrowed)