dubious

形容词 dubious:

1. fraught with uncertainty or doubt
   同义词：doubtful
2. open to doubt or suspicion- Karen Horney
   同义词：doubtful, dubitable, in question
3. not convinced

1. He shares the same rotten tastes with some dubious characters.
   他和一些不三不四的人臭味相投。
2. I remain dubious about her motives.
   我对她的动机仍存疑念。
3. I feel dubious about his honesty.
   我对他的诚实表示怀疑。
4. I feel dubious about what to do next.
   我不知道下一步该怎么办。