Source : Webster's Revised Unabridged Dictionary (1913)

Intrepid \In*trep"id\, a. [L. intrepidus: cf. F. intr['e]pide.
   See {In-} not, and {Trepidation}.]
   Not trembling or shaking with fear; fearless; bold; brave;
   undaunted; courageous; as, an intrepid soldier; intrepid
   spirit.

   Syn: Fearless; dauntless; resolute; brave; courageous;
        daring; valiant; heroic; doughty.

Source : WordNet®

intrepid
     adj : invulnerable to fear or intimidation; "audacious explorers";
           "fearless reporters and photographers"; "intrepid
           pioneers" [syn: {audacious}, {brave}, {dauntless}, {fearless},
            {unfearing}]