Antonyms of adj credible

3 senses of credible

Sense 1
credible (vs. incredible), believable -- (capable of being believed; "completely credible testimony"; "credible information")

incredible (vs. credible), unbelievable -- (beyond belief or understanding; "at incredible speed"; "the book's plot is simply incredible")
        => astounding, dumbfounding, dumfounding -- (bewildering or striking dumb with wonder)
        => fabulous -- (barely credible; "the fabulous endurance of a marathon runner")
        => improbable, marvelous, marvellous, tall (prenominal) -- (too improbable to admit of belief; "a tall story")
        => undreamed, undreamed of, undreamt, undreamt of, unimagined -- (not imagined even in a dream)

Sense 2
credible -- ((a common but incorrect usage where `credulous' would be appropriate) credulous; "she was not the...credible fool he expected")

INDIRECT (VIA credulous) -> incredulous -- (not disposed or willing to believe; unbelieving)

Sense 3
credible -- (appearing to merit belief or acceptance; "a credible witness")

INDIRECT (VIA convincing) -> unconvincing, flimsy -- (not convincing; "unconvincing argument"; "as unconvincing as a forced smile")

Similarity of adj credible

3 senses of credible

Sense 1
credible (vs. incredible), believable -- (capable of being believed; "completely credible testimony"; "credible information")
       => likely -- (within the realm of credibility; "not a very likely excuse")
       => presumptive -- (affording reasonable grounds for belief or acceptance; "presumptive evidence"; "a strong presumptive case is made out")
          Also See-> plausible#1; thinkable#1

Sense 2
credible -- ((a common but incorrect usage where `credulous' would be appropriate) credulous; "she was not the...credible fool he expected")
       => credulous (vs. incredulous) -- (disposed to believe on little evidence; "the gimmick would convince none but the most credulous")

Sense 3
credible -- (appearing to merit belief or acceptance; "a credible witness")
       => convincing (vs. unconvincing) -- (causing one to believe the truth of something; "a convincing story"; "a convincing manner")