DictionarydisbelieveNot accepting as true
verb

disbelieve

dis-bih-LEEV/ˌdɪsbɪˈliːv/

To refuse or fail to accept something as true.

The skeptical adult disbelieves the illusion after seeing the box's false bottom.

A skeptical adult shakes their head at an obvious stage magician's false-bottom box shown open, rejecting the illusion as real; no text.
Etymology

Believe moved from having confidence in a person to accepting a claim as true. Dis- reverses that acceptance, making disbelieve mean rejecting the truth or reality of what is asserted.

In context

Mormon Stories Podcast55:23
You really, you really can't be a believer in the modern LDS church and disbelieve the words I'm about to read. Emma approved, at least for a time, of four of Joseph Smith's plural marriages in Nauvoo
Could Joseph Smith Write or Dictate a Well-Worded Letter? LDS Discussions Pt. 68 | Ep. 2089

More examples

  • I find it hard to disbelieve her honest account.
  • They disbelieved his warning until the river flooded.
  • Disbelieving the results, he asks the lab to repeat the test.

Forms

disbelieve · disbelieves · disbelieved · disbelieving

disbelief noun — Failure or refusal to believe something.

Similar words

doubt
Suggests uncertainty rather than outright refusal to believe.
distrust
Questions someone's reliability rather than a particular statement's truth.