Examples:
cartography
card
archaeology
archetype
monarchy
legal
loyal
purse
personal
cinema
kinase
car
carpenter
hippopotamus
Mesopotamia
dative
data
date
...
Spanish
por
←
Spanish
pro
(doublet)
←
Latin
prō
(inherited)
←
Latin
per
(mention)
←
Old Spanish
por
(inherited)
→
Esperanto
por
(derived)
→
Spanish
pro
(doublet)
→
Spanish
para
(mention)
→
Spanish
para
(link)
→
Spanish
porque
(affix)
→
Spanish
por qué
(compound)
→
Spanish
pormenor
(affix)
→
Spanish
por ende
(compound)
→
Spanish
por doquier
(compound)
→
Spanish
por doquiera
(mention)