questionable

a questionable stockbroker.

a few men of allegedly questionable character.

Their motives for undertaking this study are highly questionable.

Your argument is based on a set of questionable assumptions.

they were deciding which measurements are questionable and which are keepers.

a shady grove of catalpas) or figuratively to what is of questionable honesty (

Independent accountants audit the company annually. The IRS audits questionable income tax returns.

That company engages in questionable business practices. Facial tattooing is a standard practice among certain peoples.

3) Geographic isolation may facilitate cryptic speciation of marine holoplankton.However,contribution of allopatric speciation is still questionable;

Whether this is true is questionable); often, however, it implies dubious morality, respectability, or propriety: