From Wiktionary, the free dictionary
I am not sure if it does not come from this instead:
From Proto-Indo-European *pro-bhwo (“being in front”), from *pro- (“being in front”), extended form of the root *per (“through, forward”) + *bʰew-, *bʰuH- "to be."
as per probus.Zezen (talk) 15:52, 3 February 2016 (UTC)Reply
