untiring Antonyms

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