*(H-)p/bh[-r/l-] again again

Much as I would love to leave my insane Austronesian( -> Proto-
Bantu) -> AfroAsiatic/IE theory behind me, and in particular the
unwieldy blob of *(H-)p/bh "water; on, at" together with *(H-)p/bh-
r/l- "one side; across; transport" with its anchoring in societies
living on both banks of a river, unfortunately facts seem to have
entered a conspiracy against this laudable intention:

Basque ibai "river", ibara "valley, estuary"

(is there a -r suffix in Basque and, if yes, what does it mean?)

from
http://www.germanistik.uni-
muenchen.de/theoretische_linguistik/vennemann.html

Torsten