Doubt v. i. [imp. & p. p. Doubted; p. pr. & vb. n. Doubting.]
  1. To waver in opinion or judgment; to be in uncertainty as to belief respecting anything; to hesitate in belief; to be undecided as to the truth of the negative or the affirmative proposition; to b e undetermined.
     Even in matters divine, concerning some things, we may lawfully doubt, and suspend our judgment.   --Hooker.
     To try your love and make you doubt of mine.   --Dryden.
  2. To suspect; to fear; to be apprehensive. [Obs.]
  Syn: -- To waver; vacillate; fluctuate; hesitate; demur; scruple; question.
  Doubt·ing, a. That is uncertain; that distrusts or hesitates; having doubts. -- Doubt*ing*ly, adv.
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  doubting
       adj : marked by or given to doubt; "a skeptical attitude"; "a
             skeptical listener" [syn: questioning, skeptical, sceptical]