Adverbs for Monotonous

unendurably; garrulously; ponderously; uninterestingly; repetitiously; unvaryingly; vapidly; irksomely; flatly; drowsily; droningly; drearily; tediously; dreadfully; boresomely; endlessly; dismally; cheerfully; dully; intolerably; wearily; unbearably; prosily.