Prefixes:
* Un-: Means "not." Creates the opposite meaning.
* Unavailable (not available)
* In-: Similar to "un-," means "not."
* Inavvailable (not available, though this is rarely used)
* Re-: Means "again" or "repeatedly."
* Reavailable (available again after being unavailable)
* Pre-: Means "before" or "in advance."
* Pre-available (available in advance of a certain time or event)
Suffixes:
* -ity: Forms a noun meaning "state or quality of."
* Availability (the state of being available)
* -able: Indicates the potential to be something.
* Available (capable of being used)
* -ment: Forms a noun meaning "act or process."
* Availabilityment (rarely used, would refer to the act of making something available)
Note: Some of these combinations might sound a little awkward or uncommon. It's important to consider the context and intended meaning when creating new words.