It is not assumed to be completely true or notable to be trusted
These claims are dubious and not scientifically proven.
He has been associated with some dubious characters.
The politician's dubious explanation raised suspicions among the voters.
After receiving an email from an unknown sender, she felt dubious about clicking on any links.
The scientific community viewed the unconventional theory with a dubious eye until further evidence was presented.
His dubious track record in business made investors hesitant to trust his latest venture.
