In this article, I touch on some lexical and morphological aspects of Prasun historical linguistics. I propose six new etymologies for Prasun words that have not been etymologized at all (üžóg “resin”, ćəwā́ “rhubarb”, wulóg “footprint”, žíma “tent, camp”) or differently (wuzógrog, zógrog “knee”, wuẓnúg, wuẓéŋ “salt”), and add further remarks to three words (üzǖ́ etc. “ice; cold”, lümī́, lümǖ́ “tail”, wəs “day”) with whose traditional etymologizations I basically agree. Furthermore, it is argued that the common epenthetic wu- ~ ü- and the final (usually) -u ~ -ü have the same origin and largely go back to the acc.sg.m/n, nom.sg.n *-am of the Indo-Iranian a-stems. Additionally, while the *-ka-suffix is present in all Nuristani languages in various functions, there is a noticeable split between Prasun, where *-ka- is added to many nouns of the inherited basic vocabulary while it is absent in the cognates in the other Nuristani languages.

This article proposes a new etymology for the Nuristani word family of Katë lod ~ lot, Nuristani Kalasha lād, etc. It is argued that these are best understood as early borrowings from Bactrian λαδο “law”.