inconstant

inconstant
    adj 1: likely to change frequently often without apparent or
           cogent reason; variable; "inconstant affections"; "an
           inconstant lover"; "swear not by...the inconstant moon"-
           Shakespeare [ant: {constant}]
    

Inconstant \In*con"stant\, a. [L. inconstans: cf. F. inconstant.
   See {In-} not, and {Constant}.]
   Not constant; not stable or uniform; subject to change of
   character, appearance, opinion, inclination, or purpose,
   etc.; not firm; unsteady; fickle; changeable; variable; --
   said of persons or things; as, inconstant in love or
   friendship. "The inconstant moon." --Shak.
   [1913 Webster]

         While we, inquiring phantoms of a day,
         Inconstant as the shadows we survey!     --Boyse.

   Syn: Mutable; fickle; volatile; unsteady; unstable;
        changeable; variable; wavering; fluctuating.
        [1913 Webster]
    

200 Moby Thesaurus words for "inconstant":
      adrift, afloat, alternating, amorphous, brittle, broken,
      capricious, careening, catchy, changeable, changeful, changing,
      choppy, coquettish, corruptible, deciduous, derelict, desultory,
      deviable, deviating, deviative, deviatory, different, disaffected,
      disconnected, discontinuous, disloyal, disorderly, disregardful,
      divaricate, divergent, diversified, diversiform, dizzy, dying,
      eccentric, elusive, ephemeral, erose, erratic, evanescent, faddish,
      fading, faithless, false, fast and loose, fickle, fitful, fleeting,
      flickering, flighty, flirtatious, flitting, fluctuating,
      fly-by-night, flying, fragile, frail, freakish, fugacious,
      fugitive, giddy, guttering, halting, herky-jerky, heteroclite,
      immethodical, impermanent, impetuous, impulsive, inattentive,
      inconsistent, indecisive, indefinite, infirm, inobservant,
      insubstantial, intermittent, intermitting, irregular, irresolute,
      irresponsible, jagged, jerky, light, lubricious, lurching, mazy,
      mercurial, momentary, moody, mortal, motley, mutable, negligent,
      nonadherent, noncompliant, nonconforming, nonconformist,
      nondurable, nonobservant, nonpermanent, nonstandard, nonuniform,
      not true to, of bad faith, passing, patchy, perishable,
      pluralistic, protean, quicksilver, ragged, rambling, recreant,
      restless, rough, roving, scatterbrained, scrappy, shapeless,
      shifting, shifty, short-lived, shuffling, skittish, snatchy,
      spasmatic, spasmic, spasmodic, spastic, spineless, sporadic,
      spotty, staggering, temperamental, temporal, temporary, ticklish,
      toying, transient, transitive, transitory, trothless,
      unaccountable, uncertain, uncompliant, unconforming, uncontrolled,
      undependable, undisciplined, undurable, unenduring, unequable,
      unequal, uneven, unfaithful, unfixed, unloyal, unmethodical,
      unmetrical, unobservant, unorthodox, unpredictable, unregular,
      unreliable, unrestrained, unrhythmical, unsettled, unstable,
      unstable as water, unstaid, unsteadfast, unsteady, unsystematic,
      untrue, ununiform, vacillating, vagrant, vague, variable,
      variegated, variform, various, varying, veering, versatile,
      vicissitudinary, vicissitudinous, volatile, wandering, wanton,
      wavering, wavery, wavy, wayward, whimsical, wishy-washy, wobbling,
      wobbly