Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
pycno
→
English
pycnonuclear
(prefix)
→
English
pycnofibre
(prefix)
→
English
pycnomorphic
(confix)
→
English
pycnospore
(prefix)
→
English
pycnometric
(confix)
→
English
pycnophylactic
(prefix)