kosha

English Wikipedia has an article on:

Koshas

Wikipedia

• kosa

Borrowed from Sanskrit कोश (kóśa, “sheath, vessel, container, layer”).

kosha (plural koshas)

1. (philosophy) Any of five sheaths that are thought to cover the Atman, or True Self, according to Vedantic philosophy.
2. A particular type of Sanskrit dictionary.
   • 2006, Encyclopedia of language and linguistics 2ed, Elsevier, page 614:

     The koshas, which are not based on any specific text, have some unusal properties. They are written in verse and include nouns and indeclinables but not verbs. The words are arranged according to topics. They deal with synonyms and homonyms and were meant for the use of poets. The best-known kosha in Sanskrit is the lexicon prepared by a Buddhist scholar Amarasinha, who was also a poet. This dictionary is usually known as Amarakosha (‘Amara's dictionary’) rather than by its actual name, Namalinganushasana.

• Ashok, Hoaks, hakos, kohas, shako

(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium. Particularly: “Somehow related to -osha?”)

-kosha (infinitive kukosha)

1. to wash
   • 1973, Mohammed S. Abdulla, Duniani kuna watu, page 3:

     […] msalani ambako kulikuwa ni faragha ya mambo yote yanayohusu kujikosha, kujisafisha, kujinadhifisha, kujitoharisha na kusali.

     the bathroom, where there was privacy for all things related to washing oneself, cleaning oneself, tidying oneself, purifying oneself, and praying.

2. to cleanse, to absolve