הַשָּׂטָן ha-Satan, is the term used for accuser or opposer; he opposes God(and man), and stands in the way to accuse them:(Zech. 3:1-2)
And he shewed me Joshua the high priest standing before the angel of
the Lord, and Satan standing at his right hand to resist him. 2 And
the Lord said unto Satan, The Lord rebuke thee, O Satan
In another example, Satan deliberately seeks to oppose men:(Job 1:9-12)
Then Satan answered the Lord, and said, Doth Job fear God for nought?
10 Hast not thou made an hedge about him, and about his house, and
about all that he hath on every side? thou hast blessed the work of
his hands, and his substance is increased in the land. 11 But put
forth thine hand now, and touch all that he hath, and he will curse
thee to thy face. 12 And the Lord said unto Satan, Behold, all that he
hath is in thy power; only upon himself put not forth thine hand. So
Satan went forth from the presence of the Lord.
What one must very carefully recognize is that God does not afflict Job, Satan does.> In Rev. 20:1-3, it says:
And I saw an angel come down from heaven, having the key of the
bottomless pit and a great chain in his hand. 2 And he laid hold on
the dragon, that old serpent, which is the Devil, and Satan, and bound
him a thousand years, 3 and cast him into the bottomless pit, and shut
him up, and set a seal upon him, that he should deceive the nations no
more, till the thousand years should be fulfilled: and after that he
must be loosed a little season.
This equates him with "serpent" that tempted Eve in the Garden of Eden(Gen. 3:1-4), and it is important to note; because although angels have names(Michael, Gabriel, Raphael(from the Book of Tobit), fallen angels do not; rather, they take on the 'name' of their demonic activity(spirit of infirmity, deaf and dumb spirit, or, if they are a 'higher order', "Prince of Persia", "Prince of Greece", and it could be said of Satan himself "King of Tyre":(Ezek. 28:12-14)
"Son of man, take up a lamentation upon the king of Tyrus, and say
unto him, Thus saith the Lord God; Thou sealest up the sum, full of
wisdom, and perfect in beauty.
13 Thou hast been in Eden the garden of God; every precious stone was
thy covering, the sardius, topaz, and the diamond, the beryl, the
onyx, and the jasper, the sapphire, the emerald, and the carbuncle,
and gold: the workmanship of thy tabrets and of thy pipes was prepared
in thee in the day that thou wast created.
14 Thou art the anointed cherub that covereth; and I have set thee so:
thou wast upon the holy mountain of God; thou hast walked up and down
in the midst of the stones of fire.
Thou wast perfect in thy ways from the day that thou wast created,
till iniquity was found in thee.
16 By the multitude of thy merchandise they have filled the midst of
thee with violence, and thou hast sinned: therefore I will cast thee
as profane out of the mountain of God: and I will destroy thee, O
covering cherub, from the midst of the stones of fire.
I believe that this is because they already are under judgement; we read in Matt. 25:41,
Then shall he say also unto them on the left hand, Depart from me,
ye cursed, into everlasting fire, prepared for the devil and his
Hell was prepared for Satan and his fallen angels-there is no repentance allowed. Therefore, Lucifer(Light-Bearer) of Isa. 14:12, becomes ha-Satan, the opposer.