Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
unbeknown
←
English
un
(prefix)
←
English
beknown
(prefix)
→
English
unbeknownst
(suffix)
→
Arabic
خفي
(link)