Adverbs for Unfeeling

unbelievably; selfishly; incredibly; unimaginably; singularly; viciously; stonily; inhumanly; sternly; austerely; callously; cruelly; coldly; downright; evidently; curiously; strangely; obdurately; implacably; terribly; preposterously; extremely; inexplainably; utterly; harshly; stubbornly; wickedly; brutally; heartlessly.