Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
known
←
Old English
cnāwen
(inherited)
←
English
know
(suffix)
←
English
n
(suffix)
←
Middle English
knowen
(inherited)
→
English
unknown
(prefix)
→
English
beknown
(prefix)
→
English
f/k/a
(mention)
→
English
underknown
(prefix)
→
English
knownness
(suffix)
→
English
knownless
(suffix)
→
English
aforeknown
(prefix)