0 thought not to be completely true, honest, or legal -- wątpliwy
a man with a dubious reputation
dubious evidence
1 not certain that something is good or true -- nieprzekonany, pełen wątpliwości
He's dubious about the benefits of acupuncture.
The industry has been plagued with dubious practices, particularly by some of the small, sometimes unregistered, operators.
Furthermore, even for scholars who are dubious about the prospects for generalization or uninterested in its pursuit, theoretical explorations of historical causation remain important.
Commoners were not the only ones who harbored dubious suspicions.
The professional informer was a dubious and thoroughly unreliable dealer in information.
Allusions to classical music appear in similarly dubious contexts.
Regrettably, the closing chapters are a disappointment, with forced and unlikely associations between architects serving dubious editorial purposes.
At times, attempts to merge them result in dubious effects.
If in the compositional process the source is transformed and either gesture or cause becomes dubious, then third-order or perhaps remote surrogacy will be invoked.