The Collaborative International Dictionary of English v.0.48:
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.
Boggling at nothing which serveth their purpose.
2. To do anything awkwardly or unskillfully.
3. To play fast and loose; to dissemble. --Howell.
Syn: To doubt; hesitate; shrink; stickle; demur.