Furqan definition

[Peaceful]

Salam,
I've been reading articles for quite a while now and they discuss the actual meaning of the word 'Furqan.'

Apparently the early Mufasirs and exegetes had a hard time understanding this word up until the 3rd Cen. Hijri.

1. They reduced the word to its jizr or root and the logical root would be FRQ.

2. Verb would be Yufariq or he divides, Al-Farq (the difference) , Mufariq (he who yufariq).

3. The nominal form appears to be Farooq (As in Umar Al-Farooq), but there is no -an suffix in any derivation. [Compare to Uthman]

4. In Syriac, a similar Semitic language, we have the common word Purqan(a) and because there is no P in Arabic it becomes Arabized as Furqan where the letter Fa replaced the Syriac Pa.

5. Purqana means Salvation in Syriac. This is how Arberry translates it in 25:1 and it fits context.

It is obviously synonymous with Quran.

Is it possible that Furqan doesn't mean Criterion / Judge, but actually means the Salvation???
Or is it dual-meaning as 'Daraba' is??

[Deliverance]

As we know that the Term "Al-Furqan" is used in connection with Moses,Sura 21"And We verily gave Moses and Aaron the Criterion (of right and wrong) and a light and a Reminder for those who keep from evil, (48)" but it is also used for the Quran.
Question:Is it also used for the Injil?

[Deliverance]

My last question was inspired by my humble understanding of sura 3:1-4"Alif Lam Mim (1) Allah! There is no Allah but He―the Living, the Self-Subsisting Eternal. (2) It is He Who sent down to thee (step by step), in truth, the Book confirming what went before it; and He sent down the Torah (Of Moses) and the Gospel (of Jesus) (3) Before this as a guide to mankind, and He sent down the Criterion (of judgment between right and wrong). Then those who reject Faith in the Signs of Allah will suffer the severest chastisement and Allah is Exalted in Might, Lord of Retribution. (4)"

If you read ayat 3 and 4 as one sentence it read different as all holy books were sent down as a guide and as the Criterion.

So "Al-Furqan"=All holy Scriptures
and not just for the Quran