The Qur’an is described in the language of descent (nuzūl), revelation (tanzīl) and presentation in Arabic. These expressions concern communication to human recipients, historically situated proclamation and intelligibility in a particular language.
An objection states that what descends or appears in an Arabic form at a time must be originated; why, then, call the Qur’an uncreated? The response distinguishes the temporal delivery of revelation from the origination of God’s attribute.
That an utterance is conveyed at a particular time establishes the temporality of the conveyance, not necessarily the beginning of the reality it signifies.