During the making of my puzzle stages I wanted to use the Riven Journals and needed something that was unique about one of them. The fourth journal contained a word written in D'ni that when transliterated said "behhahpo". Since it is in the Journal regarding the Riven Sunner creature, and is in fact written on an "evolution diagram" of the Sunner, everyone has assumed that it was simply the D'ni name for this creature. I wanted to make sure I had my facts straight before using behhhapo in a puzzle but I couldn't find any official confirmation of this, and even the D'ni dictionary sites stated that it was an unsure translation, so I emailed RAWA concerning it. He was not only able to confirm that it wasn't the Sunner's name, but he also gave me the correct translation.
In RAWA's words:
The Sunners (our nickname for them), being a Riven creature, do not have an official D'ni name. I remember giving them a Rivenese name that I don't believe was ever used anywhere, but have not been able to find it.
As for Behahpo,
hah-po (D'ni font: hapo) is a verb for "combine / mix"
behah-po (D'ni font: behapo) would be the infinitive form "to combine" or "to mix"