ANTICHRIST- The antichrist is an adversary of the Messiah, used by Satan to oppose the work of God (2 Thess 2:9; Rev 13:12). Various terms in Scripture designate this individual, including “abomination of desolation” (Dan 12:11 Matt 24:15), “the beast” (Rev 13:1-8), “the man of lawlessness” (2 Thess 2:1-10), and “antichrist.” In the Greek, the prefix anti- means “against,” “opposite,” or “in the place of.” Appropriately named, the antichrist stands against Christ and operates contrary to Him by speaking lies and blasphemies and by persecuting God’s people. In addition, he seeks to stand in the place of Christ, garnering to himself the worship due to God alone.
Doors allow access to or prevent us from entering a room or home. Gates are usually more imposing and important. They guard the access to large spaces: cities, estates, and the way to eternal life. In Bible times, most cities of any size were surrounded by walls, so gates were a constant feature in people’s’ lives. No wonder, then, that the role of gates became symbolic of other values and ideas. 
Problem: The psalmist affirms that “evildoers shall be cut off.” Elsewhere (Ps 73:27; Prov 21:28), it says they will perish (see comments on 2 thess. 1:9). But does being cut off forever mean they will be annihilated?