From what I see, it's impossible to answer for sure without knowing what a "sevel" is. That word is in the rules of succession, but nowhere else.
isnt it? 😈 I see that root word at least one other time
It means "byqre fvoyvat" (rot13). That word doesn't appear anywhere else, but vgf znfphyvar naq srzvavar sbezf qb (rot13).