Antonyms of adv incredibly

1 of 2 senses of incredibly

Sense 1
incredibly, improbably, implausibly, unbelievably -- (not easy to believe; "behind you the coastal hills plunge to the incredibly blue sea backed by the Turkish mountains")
       Antonym of credibly (Sense 1)
      => credibly, believably, plausibly, probably -- (easy to believe on the basis of available evidence; "he talked plausibly before the committee"; "he will probably win the election")

Synonyms of adv incredibly

2 senses of incredibly

Sense 1
incredibly, improbably, implausibly, unbelievably -- (not easy to believe; "behind you the coastal hills plunge to the incredibly blue sea backed by the Turkish mountains")

Sense 2
fabulously, fantastically, incredibly -- (exceedingly; extremely; "she plays fabulously well")