Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
English
positronium
←
English
positron
(suffix)
←
English
ium
(suffix)
←
English
positron
(suffix)
←
English
onium
(suffix)
→
English
onium
(link)
→
English
dipositronium
(prefix)
→
English
orthopositronium
(prefix)
→
English
parapositronium
(prefix)