Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Spanish pro
← English pro (borrowed)
← Spanish por (doublet)
← Latin prō (borrowed)

→ Spanish por (doublet)
→ Spanish proetarra (prefix)
→ Spanish propasar (prefix)
→ Spanish proconservador (prefix)
→ Spanish proinmigrante (prefix)