Synset

open to doubt or suspicion
<adj.all>   (p)   freq. cnt.: 11 freq. cnt.: 10 freq. cnt.: 1

doubtful

dubious

dubitable

in question

sample sentences

"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