What is the adjective of vacate?

There isn't a single, perfect adjective directly derived from "vacate." However, depending on the context, you could use several adjectives that convey a similar meaning:

General:

* Empty: This is a simple and straightforward option, indicating that the space is not occupied.

* Unoccupied: Similar to "empty," it emphasizes the lack of occupants.

* Available: This highlights that the space is ready for use.

Specific to a legal context:

* Vacant: This is often used in legal contexts to describe a property that is no longer inhabited.

* Abandoned: This indicates that the occupants have left the property with no intention of returning.

Other possibilities:

* Free: This emphasizes that the space is readily available.

* Unclaimed: This implies that the space is not in use and has no owner.

Ultimately, the best adjective to use depends on the specific context and the desired meaning.