Pro-file, ystlyswyneb, ystlyswedd
Pro-fit, budd, elw: buddio, ennill
Pro-found, dwfn, gorddwfn; mawr
Pro-fuse, trahael, afradus
Pro-gress, mynediad ym mlaen, ymdaith, cynnydd
Pro-ject, dyfais, cynllun: dyfeisio
Pro-logue, rhagymadrodd, rhagarawd
Pro-long, estyn, hwyhau, oedi
Prom-ise, addaw, addewid: addaw, addo
Pro-mote, dwyn ym mlaen; dyrchafu