Webster’s Revised Unabridged Dictionary · 1913
Satanic
Sa·tan′ic, Sa·tan′ic·al, a. [Cf. F. satanique, Gr. σατανικός.] Of or pertaining to Satan; having the qualities of Satan; resembling Satan; extremely malicious or wicked; devilish; infernal. "Satanic strength." "Satanic host." Milton.
Detest the slander which, with a Satanic smile, exults over the character it has ruined. Dr. T. Dwight.
— Sa·tan′ic·al·ly, adv. — Sa·tan′ic·al·ness, n.