dubious

US /ˈduː.bi.əs/
UK /ˈduː.bi.əs/
"dubious" picture
1.

怀疑的, 可疑的

hesitating or doubting

:
He was dubious about the plan's success.
他对计划的成功感到怀疑
I'm dubious about his ability to finish the project on time.
我对他能否按时完成项目感到怀疑
2.

可疑的, 不确定的

not to be relied upon; suspect

:
The claims made in the advertisement were highly dubious.
广告中的说法非常可疑
He has a dubious reputation in the business community.
他在商界声誉不佳