Definition: fraught with uncertainty or doubt
Usage: they were doubtful that the cord would hold; it was doubtful whether she would be admitted; dubious about agreeing to go
Similar words: uncertain, unsure, incertain
Definition: lacking or indicating lack of confidence or assurance
Usage: uncertain of his convictions; unsure of himself and his future; moving with uncertain (or unsure) steps; an uncertain smile; touched the ornaments with uncertain fingers
Synonyms: dubious
Definition: not convinced
Usage: they admitted the force of my argument but remained dubious
Synonyms: doubtful, dubious, dubitable, in question
Definition: open to doubt or suspicion
Usage: 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
Similar words: questionable
Definition: subject to question
Usage: questionable motives; a questionable reputation; a fire of questionable origin