Adverbs for Strenuous

indefatigably; wearisomely; formidably; remarkably; unbelievably; unspeakably; unusually; exceptionally; particularly; singularly; peculiarly; unwholesomely; disagreeably; dangerously; zealously; eagerly; laboriously; painfully; terribly; extremely; arduously; incredibly; dreadfully; impossibly; energetically; doggedly; vigorously; intensely.