The Collaborative International Dictionary of English v.0.48:
Torpidness \Tor"pid*ness\, n. The qualityy or state of being torpid. [1913 Webster]WordNet (r) 3.0 (2006):
torpidness n 1: inactivity resulting from lethargy and lack of vigor or energy [syn: listlessness, torpidity, torpidness, torpor]