in question

Từ điển WordNet v3.1 - WordNet Dictionary

adjective

open to doubt or suspicion
- the candidate's doubtful past
- he has a dubious record indeed
- what one found uncertain the other found dubious or downright false
- "it was more than dubitable whether the friend was as influential as she thought"- Karen Horney
• Syn:
doubtful, dubious, dubitable
• Similar to:
questionable
• Derivationally related forms:
dubiousness (for: dubious), doubtfulness (for: doubtful)