demon
de.mon or dae.mon also de.mon.i.cal \'de--m*n\ \di-'mo--ne--*n\ \-'ma:n-ik\ \-'ma:n-i-k*l\ \-i-k(*-)le-\ \.de--m*-n*-'za--sh*n\ \'de--m*-.ni-z\ n [ME demon, fr. LL & L; LL daemon evil spirit, fr. L, divinity, spir] often attrib it, fr. Gk daimo-n usu daemon 1: an attendant power or spirit : GENIUS 2a: an evil spirit 2b: an evil or undesirable emotion, trait, or state usu daemon 3: a supernatural being of Greek mythology intermediate between gods and me n 4: one that has unusual drive or effectiveness - de.mo.ni.an aj
Webster's English Dictionary