immutableness

from WordNet (r) 3.0 (2006)

immutableness
    n 1: the quality of being incapable of mutation; "Darwin
         challenged the fixity of species" [syn: {immutability},
         {immutableness}, {fixity}] [ant: {mutability},
         {mutableness}]

from The Collaborative International Dictionary of English v.0.48

Immutable \Im*mu"ta*ble\, a. [L. immutabilis; pref. im- not +
   mutabilis mutable. See {Mutable}.]
   Not mutable; not capable or susceptible of change;
   unchangeable; unalterable.
   [1913 Webster]

         That by two immutable things, in which it was
         impossible for God to lie, we might have a strong
         consolation.                             --Heb. vi. 18.
   [1913 Webster]

         Immutable, immortal, infinite,
         Eternal King.                            --Milton.
   -- {Im*mu"ta*ble*ness}, n. -- {Im*mu"ta*bly}, adv.
   [1913 Webster]