Pro-ceed, cynnyrchiant, ennill; dilyn, myned ym mlaen; deillio, tarddu
Pro-cess, mynediad ym mlaen; cynghawsedd
Pro-claim, cyhoeddi
Proc-tor, dirprwywr, dadleuwr
Pro-cure, ceisio, caffael; prynu
Pro-duce, cynnyrch: dwyn allan; cynnyrchu, deilliaw
Prod-uct, daill, cynnyrch
Pro-fane, halog; halogedig: halogi
Pro-fess, proffesu, cyffesu; dilyn
Prof-fer, cynnygiad: cynnyg