insolubleness

From insoluble +‎ -ness.

insolubleness (uncountable)

1. The quality or state of being insoluble; insolubility.
   • 1672, Robert Boyle, “[Tracts. […].] An Hydrostatical Discourse, Occasioned by the Objects of the Learned Dr. Henry More, against Some Explications of New Experiments Made by Mr. Boyle; and Now Published by Way of Preface to the Three Ensuing Tracts. Chapter V.”, in The Works of the Honourable Robert Boyle. […], volume III, London: […] A[ndrew] Millar, […], published 1744, →OCLC, section II, page 281, column 1:

     But that vve may the more diſtinctly conſider this grand argument, […] it vvill be convenient to obſerve, that it does, at once, both propoſe a queſtion, and contain an objection, grounded upon the ſurmiſed inſolubleneſs of that queſtion.

   • 1852, Herman Melville, Pierre; or The Ambiguities:

     All his occasional pangs of dubiousness as to the grand governing thing of all—the reality of the physical relationship—only recoiled back upon him with added tribute of both certainty and insolubleness.

• “insolubleness”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.