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For a tentative explanation of the allegory of the sinners' being "linked together" in hell, see my note [64] on 14:49 . As regards the "tight space" into which they will be flung, Zamakhshari remarks: "Distress is accompanied by [a feeling of] constriction, just as happiness is accompanied by [a feeling of] spaciousness; and because of this, God has described paradise as being 'as vast as the heavens and the earth' [ 3:133 ]."
Anything-total annihilation-would be better than the anguish they will suffer. But no annihilation will be granted to them. One destruction will not be enough to wipe out the intensity of their anguish. They will have to ask for many destructions, but they will not get them!