doubtful dubious dubitable in question
doubtful%5:00:00:questionable:00 dubious%5:00:00:questionable:00 dubitable%5:00:00:questionable:00 in_question%5:00:00:questionable:00
dvomljiv negotov sumljiv
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)