a.
1.
On the back.
2.
Indolent, sluggish, lazy, slothful, idle, inert, torpid, languid, dull, lumpish, listless, careless, thoughtless, inattentive, negligent, heedless, drowsy, indifferent, otiose, lethargic, apathetic, sleepy.
SUPINE
Meaning of SUPINE in English
Soule. Dictionary of English synonyms. Словарь английских синонимов. 2012