dubious
/ˈdubiəs/
hesitating or doubting; not to be relied upon
dubious in a sentence
“The origins of this artifact are dubious at best.”
Origin of dubious
Latin dubius doubtful (from duo two, suggesting wavering between two options)
Related Words
agnostic
neither believing nor disbelieving; uncertain
ambivalent
having mixed feelings or contradictory ideas
equivocal
open to more than one interpretation; ambiguous
tentative
not certain or fixed; provisional
provisional
arranged or existing for the present, possibly to change
conjecture
an opinion based on incomplete information