Source : Webster's Revised Unabridged Dictionary (1913)

Boggle \Bog"gle\, v. t.
   To embarrass with difficulties; to make a bungle or botch of.
   [Local, U. S.]

Boggle \Bog"gle\, v. i. [imp. & p. p. {Boggled}; p. pr. & vb. n.
   {Boggling}.] [ See {Bogle}, n.]
   1. To stop or hesitate as if suddenly frightened, or in
      doubt, or impeded by unforeseen difficulties; to take
      alarm; to exhibit hesitancy and indecision.

            We start and boggle at every unusual appearance.
                                                  --Glanvill.

            Boggling at nothing which serveth their purpose.
                                                  --Barrow.

   2. To do anything awkwardly or unskillfully.

   3. To play fast and loose; to dissemble. --Howell.

   Syn: To doubt; hesitate; shrink; stickle; demur.

Source : WordNet®

boggle
     v 1: startle with amazement or fear
     2: hesitate when confronted with a problem, or when in doubt or
        fear
     3: overcome with amazement; "This boggles the mind!" [syn: {flabbergast},
         {bowl over}]