Antonyms for



Antonyms of adj doubtful

3 senses of doubtful

Sense 1:
doubtful, dubious, dubitable, in question(predicate)

INDIRECT (VIA questionable) -> unquestionable

Sense 2:
doubtful, dubious

INDIRECT (VIA uncertain, unsure) -> certain, sure
INDIRECT (VIA uncertain, unsure) -> certain, sure

Sense 3:
doubtful, tentative

INDIRECT (VIA unsettled) -> settled
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