What is an adjective from memory?

It's tricky to have an adjective directly from "memory" because it's a noun. However, we can create adjectives *related* to memory:

Adjectives describing memory:

* Memorable: Something that is easily remembered.

* Memoir: Relating to a personal account of past experiences.

* Mnemonic: Relating to memory techniques.

* Amnesiac: Relating to memory loss.

* Forgetful: Having a poor memory.

* Recollective: Relating to the act of remembering.

Adjectives using "memory" as part of the word:

* Memory-laden: Full of memories.

* Memory-based: Reliant on memory.

The best adjective to use depends on the specific context you're writing in.