一切經音義 22.110

22.110

阿迦尼吒天 (Akaniṣṭha Heaven): Fully called *Akaniṣṭha*. *Aka* means form (rūpa), and *niṣṭha* means ultimate; among the eighteen heavens of the Form Realm, this is the final and highest. Another explanation says: *A-* means not, and *kaniṣṭha* means smallest; among the eighteen heavens of the Form Realm, the lowest heaven is only small and not large, the middle sixteen heavens are relative to each other both larger and smaller, while this one heaven is only large and not small; hence it is named.