Sleeping deeply:
— It would be cruel to wake him; he's sound asleep.

synonym: fast asleep.

Roget 683: inactive; motionless etc. 265; unoccupied etc. (doing nothing) 681; unbusied^†.    indolent, lazy, slothful, idle, lusk^†, remiss, slack, inert, torpid, sluggish, otiose, languid, supine, heavy, dull, leaden, lumpish^†; exanimate^†, soulless; listless; drony^†, dronish^†; lazy as Ludlam's dog.    dilatory, laggard; lagging etc. v.; slow etc. 275; rusty, flagging; lackadaisical, maudlin, fiddle-faddle; pottering etc. v.; shilly-shally etc. (irresolute) 605.    sleeping, etc. v.; asleep; fast asleep, dead asleep, sound asleep; in a sound sleep; sound as a top, dormant, comatose; in the arms of Morpheus, in the lap of Morpheus.    sleepy, sleepful^†; dozy^†, drowsy, somnolent, torpescent^†, lethargic, lethargical^†; somnifacient^†; statuvolent^†, statuvolic^†; heavy, heavy with sleep; napping; somnific^†, somniferous; soporous^†, soporific, soporiferous^†; hypnotic; balmy, dreamy; unawakened, unawakened.    sedative etc. 174.    ... show more