- Open to question
- Suspicious
- Uncertain
- Unconvinced
- Unlikely
- 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.
- 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.
- Dubious
- Far-fetched
- Implore Sybil to sound far-fetched
- Improbable
- Not credible
- Unbelievable
- Unlikely
- A bet against heavy odds
- Unlikely winner