Adverbs for Rigid

harshly; austerely; cruelly; bitterly; sternly; severely; brutally; ungenerously; narrow-mindedly; dogmatically; tyrannically; puritanically; doctrinally; intolerantly; stiffly; painfully; terribly; dreadfully; stonily; bleakly; uncompromisingly; intolerably; woefully; coldly.