invariable

invariable
    adj 1: not liable to or capable of change; "an invariable
           temperature"; "an invariable rule"; "his invariable
           courtesy" [ant: {variable}]
    n 1: a quantity that does not vary [syn: {constant}, {constant
         quantity}, {invariable}]
    

Invariable \In*va"ri*a*ble\, a. [Pref. in- not + variable: cf.
   F. invariable.]
   Not given to variation or change; unalterable; unchangeable;
   always uniform.
   [1913 Webster]

         Physical laws which are invariable.      --I. Taylor.
   -- {In*va"ri*a*ble*ness}, n. -- {In*va"ri*a*bly}, adv.
   [1913 Webster]
    

Invariable \In*va"ri*a*ble\, n. (Math.)
   An invariable quantity; a constant.
   [1913 Webster]
    

103 Moby Thesaurus words for "invariable":
      abiding, accordant, alike, automatic, balanced, blah,
      broken-record, changeless, consistent, consonant, constant,
      continuous, correspondent, drearisome, dreary, dry, dryasdust,
      dull, dusty, enduring, equable, equal, eternal, even, everlasting,
      fast, fixed, flat, harping, homogeneous, humdrum, immovable,
      immutable, inalterable, incommutable, inconvertible, indefeasible,
      inert, inflexible, insusceptible of change, intransmutable,
      invariant, irretrievable, irreversible, irrevocable, jog-trot,
      lasting, level, long-winded, measured, mechanical, methodic,
      monolithic, monotonous, noble, nonreturnable, nonreversible,
      of a piece, ordered, orderly, permanent, persistent, prolix,
      regular, reverseless, rigid, robotlike, set, singsong, smooth,
      stable, steadfast, steady, systematic, tedious, treadmill,
      unalterable, unalterative, unaltered, unbroken, unchangeable,
      unchanged, unchanging, undeflectable, undeviating,
      undifferentiated, undiversified, uneventful, unexceptional,
      unfailing, uniform, unmodifiable, unmodified, unmovable,
      unremitting, unrestorable, unreturnable, unruffled, unsusceptible,
      unvariable, unvaried, unvarying, unwavering