The Collaborative International Dictionary of English v.0.48:

Immeability \Im`me*a*bil"i*ty\, n. [Pref. im- not + L. meabilis
   passable, fr. meare to pass.]
   Lack of power to pass, or to permit passage; impassableness.
   [1913 Webster]

         Immeability of the juices.               --Arbuthnot.
   [1913 Webster]