be dubious

Examples (10)

• I am dubious about the success of this plan.
• She was dubious of his intentions from the very beginning.
• The claim that the product works overnight is highly dubious.
• Frankly, the legality of their methods is dubious.
• Many investors are dubious about the company's future prospects.
• The politician's promises were so grand that they were inherently dubious.
• The scientific value of his research is dubious, as it lacks proper data.
• He is a man of dubious character, known for his dishonesty.
• After hearing the strange noise, I was dubious about entering the old house.
• The source of the information is dubious, so we cannot rely on it.