Of the numerous Iranian languages in which the word is attested, the initial "xᵛ-" is evident only as Avestan "khvar(e)nah" and as Zoroastrian Middle Persian "khwarrah", from which New Persian "khorra" then derives. In other Iranian dialects the word has an "f-" form, for instance as Median and Old Persian "farnah-", from which Middle- and New Persian "farr(ah)" and adjectival "farrokh" derive. For many decades, the "f-" form was believed to represent a specific Median sound-law change of proto-Iranian "xᵛ-" to "f-". The hypothesis has since been shown to be untenable, and the proto-Iranian form is today reconstructed as "*hu̯", preserved in Avestan as "xᵛ-" and dissimilated as "f-" in other Iranian dialects.