Antonyms of adj dumfounding

1 sense of dumfounding

Sense 1
astounding, dumbfounding, dumfounding -- (bewildering or striking dumb with wonder)

INDIRECT (VIA incredible) -> credible, believable -- (capable of being believed; "completely credible testimony"; "credible information")

Similarity of adj dumfounding

1 sense of dumfounding

Sense 1
astounding, dumbfounding, dumfounding -- (bewildering or striking dumb with wonder)
       => incredible (vs. credible), unbelievable -- (beyond belief or understanding; "at incredible speed"; "the book's plot is simply incredible")