dubious

/ˈdjuːbi.əs/

adjective

(of a statement) Arousing doubt; questionable; open to suspicion.
"After he made some dubious claims about the company, fewer people trusted him."
(of a person) In disbelief; wavering, uncertain, or hesitating in opinion; inclined to doubt; undecided.
"She was dubious about my plan at first, but later I managed to persuade her to cooperate."

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