[Mesorah] Arovim - Arovois

[Zev Sero]

On 16/10/2012 8:46 AM, SBA wrote:
> Pardon my ignorance for asking.
> While the 4th partner in the Arba Minim is known as 'Arovois', in Tehillim
> (137) we see "Al Arovim besochah".
>
> Are the words interchangeable  - or what?

In Tanach "willow" seems to be consistently masculine.  Not only "`arvei
nachal" rather than "`arvois", but also see Yeshaya 15:7, 44:4.
But what is the singular?

"`Aravah", in Tanach, seems to always mean a plain, desert, or other
expanse of territory ("`Arvos Moav", or the Heaven called "`Aravos").


-- 
Zev Sero        "Natural resources are not finite in any meaningful
zev at sero.name    economic sense, mind-boggling though this assertion
                  may be. The stocks of them are not fixed but rather
		 are expanding through human ingenuity."
		                            - Julian Simon