Source : Webster's Revised Unabridged Dictionary (1913)

Blench \Blench\, v. i. [imp. & p. p. {Blenched}; p. pr. & vb. n.
   {Blenching}.] [OE. blenchen to blench, elude, deceive, AS.
   blencan to deceive; akin to Icel. blekkja to impose upon.
   Prop. a causative of blink to make to wink, to deceive. See
   {Blink}, and cf. 3d {Blanch}.]
   1. To shrink; to start back; to draw back, from lack of
      courage or resolution; to flinch; to quail.

            Blench not at thy chosen lot.         --Bryant.

            This painful, heroic task he undertook, and never
            blenched from its fulfillment.        --Jeffrey.

   2. To fly off; to turn aside. [Obs.]

            Though sometimes you do blench from this to that.
                                                  --Shak.