The Collaborative International Dictionary of English v.0.48:

unholy \un*ho"ly\ ([u^]n*h[=o]"l[y^]), a.
   Not holy; unhallowed; not consecrated; hence, profane;
   wicked; impious. -- un*ho"li*ly, adv. -- un*ho"li*ness,
   n.
   [1913 Webster]