My linguistic analysis points to the idea that afterall the so called 4-divisions of Indian society over the millenia called as a caste system was neither caste nor an overtly religious institution but a simple observation of what major sections fo society existed. In fact such a system was far less contrived than is supposed and spread today for political and social gains. This is basically a social-religious-political ploy to exploit the innocence of a system and is equally propagated by vicious forces in west and India itself. In fact most of it is also to be found in other Asiatic countries in exact or similar forms and 4-division was an order of the day in a vast continental scope rather than present day India. Indonesia and Japan had their divisions mostly akin or same as India’s. Here is the meaning. You can swap the order since its an observation rather than a dictum.
1. xatriya/kshyatria .. kasa-tar .. kasa=umbrella/protection/cover/ruling/administration. tar=hold/manage/transcend/pass-over
2. baraman .. accepted by heart, gentle, friendly, honorable, respectable, scholarly, worldly, cognates with manbar=manyabara=monoyabaraka subramanya=ishubarmana etc [mixing of religion with scholarship] barman/varma/varan [mixing of admin/governance with scholarship]
3. vaishya/baishya/bashya masters/skillful/artisans/businessmen/enterprisers/experts comes from bash = to occupy, to control, to skillfully master an occupation or profession vaisha [mixing of religion with such professions] because it could mean bisnu+bashy which introduces only the “i” of ishu = God but sh is already there so not a hard job.
It might simply have been tar
tar=transcend, pass-over, execute, farm, hold, manage, admin but segregated from eg ksyatria. So its just the observed economic section which may or may not have relations with other sections. But since there is always mixing eg religious ideals of a society makes them stick to various sections, bramana to ksytria and tar’s to ksyatria and vaishya and so on. 4-section is not exclusive but there are more but they can be easily classified into 4 or less. This then through intercultural and trade relations over 1000s years goes into other continental societies and even comes back mixed and sometimes subverted.