The Hebrew/Aramaic noun appeden refers to a royal palace or throne pavilion — likely a loanword from Persian or Old Persian, used once in Daniel 11:45 to describe the eschatological enemy who 'pitches his palatial tents' between the seas and the holy mountain.
Daniel 11:45's use of appeden is part of the detailed eschatological vision of the 'king of the north' who sets up his palatial encampment between the Mediterranean and the Dead Sea, 'at the glorious holy mountain' — yet 'comes to his end, with none to help him.' The tent-palace planted between the seas echoes Antiochus IV Epiphanes and prefigures the final Antichrist of Revelation. The ultimate appeden — the dwelling of God — will displace all earthly pretension to divine dwelling.