unbelievingly

From Wiktionary

Word parts[change]

un- + believing + -ly
unbelieving + believingly

Adverb[change]

Positive
unbelievingly

Comparative
more unbelievingly

Superlative
most unbelievingly

  1. If something is called unbelievingly, it is not something that can be believed or is seen in a manner that is believable.