unbelieve

As an adjective incredible

is incredible.

As a verb unbelieve is

(lb) to lose, give up, abandon, or relinquish belief in; stop believing.

As a noun disbelief

is unpreparedness, unwillingness, or inability to believe that something is the case.

As a verb unbelieve is

(lb) to lose, give up, abandon, or relinquish belief in; stop believing.

is likely misspelled.

has no English definition.

As a verb unbelieve

is to lose, give up, abandon, or relinquish belief in; stop believing.

As verbs the difference between doubt and unbelieve

is that doubt is (ambitransitive) to lack confidence in; to disbelieve, question, or suspect while unbelieve is (lb) to lose, give up, abandon, or relinquish belief in; stop believing.

As a noun doubt

is uncertainty, disbelief.

As a verb unbelieve

is to lose, give up, abandon, or relinquish belief in; stop believing.

As an adjective unbelieved is

that is not believed; disbelieved.

As verbs the difference between believe and unbelieve

is that believe is to accept as true, particularly without absolute certainty (i.e., as opposed to knowing while unbelieve is to lose, give up, abandon, or relinquish belief in; stop believing.

As a noun unbeliever

is one who does not believe, particularly in a deity (used by believers to describe other people).

As a verb unbelieve is

(lb) to lose, give up, abandon, or relinquish belief in; stop believing.