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The Collaborative International Dictionary of English v.0.48 (gcide)

Doubtful \Doubt"ful\, a.
1. Not settled in opinion; undetermined; wavering; hesitating
in belief; also used, metaphorically, of the body when its
action is affected by such a state of mind; as, we are
doubtful of a fact, or of the propriety of a measure.
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Methinks I should know you, and know this man;
Yet I am doubtful. --Shak.
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With doubtful feet and wavering resolution.
--Milton.
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2. Admitting of doubt; not obvious, clear, or certain;
questionable; not decided; not easy to be defined,
classed, or named; as, a doubtful case, hue, claim, title,
species, and the like.
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Beauty is but a vain and doubtful good. --Shak.
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Is it a great cruelty to expel from our abode the
enemy of our peace, or even the doubtful friend [i.
e., one as to whose sincerity there may be doubts]?
--Bancroft.
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3. Characterized by ambiguity; dubious; as, a doubtful
expression; a doubtful phrase.
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4. Of uncertain issue or event.
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We . . . have sustained one day in doubtful fight.
--Milton.
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The strife between the two principles had been long,
fierce, and doubtful. --Macaulay.
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5. Fearful; apprehensive; suspicious. [Obs.]
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I am doubtful that you have been conjunct
And bosomed with her. --Shak.

Syn: Wavering; vacillating; hesitating; undetermined;
distrustful; dubious; uncertain; equivocal; ambiguous;
problematical; questionable.
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