Let no one deceive you in any way. For it will not be, unless the departure comes first, and the man of sin is revealed, the son of destruction,
The word "perdition" (apolia) means "the destruction which consists in the loss of eternal life, eternal misery, perdition" (Thayer 70-2-684). Thayer further comments "it is the lot of those excluded from the kingdom of God...a man doomed to eternal misery...(of Antichrist)" (see John 17:12; 2 Peter 3:7).