dubious

US /ˈduː.bi.əs/

UK /ˈduː.bi.əs/

1.

hesitating or doubting

:

•

He was dubious about the plan's success.

•

I'm dubious about his ability to finish the project on time.

:

doubtful skeptical uncertain hesitant unsure

2.

not to be relied upon; suspect

:

•

The claims made in the advertisement were highly dubious.

•

He has a dubious reputation in the business community.

:

questionable suspicious unreliable untrustworthy fishy