untiring Antonyms

fit to drop supine somnific snoring sluggish slow slothful sleepy sleepful slack shiftless passive otiose tired torpid awfully tired asleep on the job unindustrious unenthusiastic dead on one's feet clapped out work-shy all in whacked weary unready unconcerned negligent neglectful faineant enervated drowsy drony dronish dead beat dallying comatose casual careless bushed beat flagging idle listless lethargic lazy languorous languid lackadaisical irresolute