WordNet 3.0 Copyright © 2006 by Princeton University.
- 1. doubtful, dubious, uncertain (vs. certain), unsure (vs. sure), incertain
- usage: fraught with uncertainty or doubt; "they were doubtful that the cord would hold"; "it was doubtful whether she would be admitted"; "dubious about agreeing to go"
- 2. doubtful, dubious, dubitable, in question(predicate), questionable (vs. unquestionable)
- usage: 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
- 3. dubious, unconvinced (vs. convinced)
- usage: not convinced; "they admitted the force of my argument but remained dubious"
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See also: dubious (Dictionary)