dubious

adjective3

1. •
   Arousing doubt; questionable; open to suspicion.

   • After he made some dubious claims about the company, fewer people trusted him.
   • They were renowned as people of dubious morals.
2. •
   Generally considered imprecise or wrong, but not totally unplayable.
3. •
   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.