supinity

Etymology
, from.

Noun

 * 1)  The quality of being supine; negligence; laziness; heedlessness.
 * 2) * 1769, Pierre Henri Treyssac de Vergy, The Mistakes of the Heart: or Memoirs of Lady Carolina Pelham and Lady Victoria Nevil, London: J. Murdoch, Volume 3, Letter 5, p. 41,
 * It was a mistake of my heart, a deceit of my imagination. Carolina, who ever thought it would at last prove so, often inveighed against my supinity, and advised me to listen to reason.—I never did
 * It was a mistake of my heart, a deceit of my imagination. Carolina, who ever thought it would at last prove so, often inveighed against my supinity, and advised me to listen to reason.—I never did