For Strong's Hebrew number 7854 (Satan) the Brown-Driver-Briggs' notes give these meanings:
(1) adversary, one who withstands
(1a) adversary (in general — personal or national)
(2) superhuman adversary
(2a) Satan (as noun proper)
And Strong gives us:
From H7853; an opponent; especially (with the article prefixed) Satan, the arch enemy of good: - adversary, Satan, withstand.
Whereas SH7834 has:
A primitive root; to attack, (figuratively) accuse: - (be an) adversary, resist.
The first meaning of SH7835 seems to agree with the root form. The second sticks out as quite a bit different.
Can anyone explain where this second meaning (superhuman adversary & proper noun) comes from (ideally with sources I can go and look at) and from what point in time this second meaning might have been contemporarily understood?