Main Entry: du·bi·ous

Pronunciation: \ˈdü-bē-əs also dyü-\

Function: adjective

Etymology: Latin dubius, from dubare to vacillate; akin to Latin duo two — more at two

Date: 1548

1 : giving rise to uncertainty: as a : of doubtful promise or outcome <a dubious plan> b : questionable or suspect as to true nature or quality <the practice is of dubious legality>
2 : unsettled in opinion : doubtful <I was dubious about the plan>

synonyms see doubtful

— du·bi·ous·ly adverb

— du·bi·ous·ness noun