And death and hell were cast into the lake of fire. This is the second death.
Berean Study Bible (BSB) - Revelation 20:14 >Then Death and Hades were thrown into the lake of fire. This is the second death—the lake of fire.
Textus Receptus (TR) - Revelation 20:14 >Καὶ ὁ Θάνατος καὶ ὁ ᾍδης ἐβλήθησαν εἰς τὴν λίμνην τοῦ πυρός· οὗτός ἐστιν ὁ δεύτερος θάνατος.