Thread by @Aabhas24

There is nothing called "Avarna" categorization in any Vedas or other scriptures.

We have word ‘Avarna’ But it’s called आवरण & not अवर्ण & is explained as below:

A) Āyurveda

Āvaraṇa (आवरण) is a Sanskrit technical term, translating to “covering” or “obstruction”.

https://twitter.com/jaiminism/status/1384824372712513538

The term is used throughout Āyurvedic literature such as the Suśruta-saṃhitā and the Caraka-saṃhitā.

Source:Wisdom Library: Āyurveda and botany

B) In āvaraṇa (obstruction episodes),the doṣa that obstructs is aggravated and the one that is obstructed is said to be innocent (pure normal).

(Source): PMC: Ayurvedic management of postlumbar myelomeningocele surgery

C) Āvaraṇa (आवरण).—A son of Bharata and Pāñcajanī.

(Source): Cologne Digital Sanskrit Dictionaries: The Purana Index

D) Pali Language

āvaraṇa : shutting off; hindrance; a bar; a screen.

(Source): BuddhaSasana: Concise Pali-English Dictionary

E) Mahayana

Āvaraṇa (आवरण, “obstacle”) refers to a set of three obstacles, according to the Mahāprajñāpāramitāśāstra chapter X.

There are three kinds of obstacles (āvaraṇa):

1)The obstacle consisting of the afflictions (kleśa-āvaraṇa),
2) The obstacle consisting of action (karma-āvaraṇa)
3) The obstacle consisting of retribution (vipāka-āvaraṇa).

Of these three obstacles, action is the greatest. Once accumulated, actions last for hundreds of koṭi of kalpas without being lost, changed or deteriorating.

They produce their fruit of retribution (vipākaphala) without loss of time; when these long-lasting actions meet the favorable complex of conditions and time, they produce their fruit of retribution.

(Source): Wisdom Library: Maha Prajnaparamita Sastra

I challenge people like @jaiminism to find me single reference to Avarna in context of Society distribution. Some corruption occurred during translations of Puranas & Smritis as Orientalist always believed Avarna as Antonym of Varna (colour).