supinely

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su·pine

S5959750 (so͞o′pīn′, so͞o-pīn′)adj.1. Lying on the back or having the face upward.2. Having the palm upward. Used of the hand.3. Marked by or showing lethargy, passivity, or blameworthy indifference: "No other colony showed such supine, selfish helplessness in allowing her own border citizens to be mercilessly harried" (Theodore Roosevelt).n. In Latin grammar, a verbal noun used in only a few syntactic constructions and occurring in only two cases, an accusative in -tum or -sum and an ablative in -tū or -sū. The accusative form of the supine is sometimes considered to be the fourth principal part of the Latin verb.
[Middle English supin, Latin verbal noun, from Late Latin supīnum (verbum), (verb) lying on its back, (verb) going back, neuter of Latin supīnus; see upo in Indo-European roots.]
su·pine′ly adv.su·pine′ness n.
Thesaurus
Adv.1.supinely - with the face upward; "she was stretched supinely on her back"
2.supinely - in an indifferently supine manner; "he called the tune to me and I supinely took it up"