Apostasy, in a religious context, refers to the abandonment or rejection of one’s religion or faith. It can also be used more generally to describe the abandonment of a cause, principle, or loyalty.
Aralim
(or erelim; Hebrew אראלם) Literally, “warriors, heroes, valiant ones.” According to Kabbalah, a being related to the sephirah Binah, equivalent to the Christian hierarchical levels of “Dominions” and “Thrones.”
“Behold, their אראלם [valiant ones] shall cry without: the ambassadors of peace shall weep bitterly.” —Isaiah 33:7
Arcanum
Latin: Mystery, the plural of arcana.
A secret, a mystery known only to the specially educated.
Archeus
From Ancient Greek ἀρχαῖος (arkhaîos, “original, ancient”). Compare with Arche (/ˈɑːrki/; Ancient Greek: ἀρχή; “beginning”, “origin” or “source of action”) + Chaos (Ancient Greek: χάος, romanized: kháos), the void, the Absolute. In alchemy, archeus refers to the vital principle or force that presides over the growth and continuation of living beings; the anima mundi or malleable power of the alchemists and philosophers.