Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
troubled
→
English
untroubled
(prefix)
→
English
troubledly
(suffix)
→
English
troubledness
(suffix)
→
English
nontroubled
(prefix)
→
English
distroubled
(prefix)
→
English
overtroubled
(prefix)