Antonyms of adv believingly

1 sense of believingly

Sense 1
credulously, believingly -- (in a credulous manner; "the children followed the teacher credulously")
       Antonym of unbelievingly (Sense 1)
      => incredulously, unbelievingly, disbelievingly -- (in an incredulous manner; "the woman looked up at her incredulously")

Synonyms of adv believingly

1 sense of believingly

Sense 1
credulously, believingly -- (in a credulous manner; "the children followed the teacher credulously")