Genre without a name: Was there a Hebrew term for "apocalypse"?

Although the term for "apocalypse" is not attested as a title or genre definition in the extant corpus of Hebrew or Jewish Aramaic documents, some early Hebrew, Syriac, and Arabic texts may contain rudimentary evidence in favor of the existence of a Hebrew or Jewish Aramaic equivalent for the term. Moreover, its reconstruction can contribute to better understanding of certain wide spread apocalyptic imagery, which must be closely connected to the semantics of this term.