unbelieve

English

Etymology

From un- +‎ believe.

Verb

unbelieve (third-person singular simple present unbelieves, present participle unbelieving, simple past and past participle unbelieved)

1. (transitive, intransitive) To lose, abandon, or relinquish belief in; stop believing.
   • 2004, Treva Harte, Lani Aames, Maryjanice Davidson, Nicely Naughty:

     She began to unbelieve when she was eight years old.” Unbelieve. The word brought incredible sadness to them all. Every time a child started to unbelieve, a little of the magic of Christmas was lost.