The Open Dictionary

incredulously

adverb

UK/ɪnˈkredʒ.ə.ləs.li/
US/ɪnˈkredʒ.ə.ləs.li/

Definitions of incredulously adverb

  1. in a manner indicating disbelief or skepticism

    • "Did you really finish it?" he asked incredulously.

    • She stared incredulously when she heard the news.

    • "He actually resigned?" she said incredulously.