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Yes it does mean that those in hell will be tormented forever. The fire will not consume them, thus total annihilation is untrue......if that's what you are referring to.
"And the devil, who deceived them, was thrown into the lake of burning sulfur, where the beast and the false prophet had been thrown. They will be tormented day and night for ever and ever." (Revelation 20:10)
"And the devil, who deceived them, was thrown into the lake of burning sulfur, where the beast and the false prophet had been thrown. They will be tormented day and night for ever and ever." (Revelation 20:10)
To uderstand the Revelation we must go back to Rev. 14:10; "and he shall be tormented in fire and brimstone before the holy messangers, before the Lamb..."
'Thayer's Lexicon' gives the primary meaning of the verb Basanizo (torment): "to test (metals) by touchstone, which is a black siliceous stone used to test the purity of gold or silver by the colour of the streak produced on it by rubbing it with the metal"
Primary meaning of the noun Theion (brimstone); "divine insense, because burning brimstone was regarded as having power to purify, and ward off disease"
'Friberg's Analytical Lexicon confirms that Theion was "anciently regarded as divine insense to purify and prevent contagion."
If we relate this word to God (Theios) the word being derived from Him, we have an image of divine fire, a fire that tests for the purity of substance - basanizo - a process of purging inferior element to reveal purity, quality, refinement. To be tormented with fire and brimstone in a biblical sense, by the very definition of the word; is to be tried and purified by Divine fire.
Also 'ever and ever' is not a never ending period of time, does not mean infinity, 'ever' translated from aion, now we have a word that simply means 'age', that is what the Koine Greek means, and that is consistent with Biblical etymological interpretation, to double it 'age of ages' does not mean infinity years; it means a period of time defined by God, and not defined by humans.