"Enemy", "accuser" in Hebrew
. The form from which word "Satan
" originated from.
In The Wheel of Time, the true name of Dark One, the antithesis of creator and bodiment of all evil. It is believed that saying his true name brings bad luck (just like hebrews believed saying God's true name, Jahve (or JHWH in literal form) brings bad luck), and indeed, the few times Shai'tan has been named, strange things have happened [in the books].