1 adjectives to describe supine

And as I watched them, ever and anon The quivering limb and half-unclosèd eye Witnessed of torture scarce endured, and yet Endured; for still the dream had mastery, And held them in a helplessness supine; Till, by degrees, the labouring breath grew calm, Save frequent murmured sighs; and o'er each face Stole radiant sadness, and a hopeful grief; And the convulsive motion passed away.

1 adjectives to describe  supine