Hell is eternal death, not eternal dying, just as heaven is eternal life, not eternal living. Big distinctions.
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.
Rev 14:9 If anyone worships the beast and his image and receives his mark on the forehead or on the hand, 10 he, too, will drink of the wine of God’s fury, which has been poured full strength into the cup of his wrath.
He will be tormented with burning sulfur in the presence of the holy angels and of the Lamb. 11 And the smoke of their torment rises for ever and ever. There is no rest day or night for those who worship the beast and his image, or for anyone who receives the mark of his name.”