Akanittha: the ‘Great or Non-junior Ones’, i.e. ‘Highest Gods’, are the inhabitants of the 5th and highest heaven of the Pure Abodes suddhāvāsa, cf. avacara deva II Anāgāmī

Anāgāmī: T he Non-Returner is a Noble Disciple Ariya-puggala on the 3rd stage of Nobility. There are 5 classes of Non-Returners, as it is said e.g. Pug. 42-46:

A being, through the disappea …

Avacara: S phere, realm, level or dimension. The 3 levels of existence are: the sense-level kāmāvacara, the fine-material level rūpāvacara, the formless level arūpāvacara. Which things are …