Source : Webster's Revised Unabridged Dictionary (1913)

Ineluctable \In`e*luc"ta*ble\, a. [L. ineluctabilis; pref. in-
   not + eluctabilis to be surmounted, fr. eluctari to struggle
   out of, to surmount: cf. F. in['e]luctable. See {Eluctate}.]
   Not to be overcome by struggling; irresistible; inevitable.
   --Bp. Pearson.

         The ineluctable conditions of matter.    --Hamerton.

Source : WordNet®

ineluctable
     adj : impossible to avoid or evade:"inescapable conclusion"; "an
           ineluctable destiny"; "an unavoidable accident" [syn: {inescapable},
            {unavoidable}]