Ubhaya - Two translation questions from one quote

[Raftafarian]

you won’t be in this world or the world beyond or between the two.
tato tvaṁ, bāhiya, nevidha na huraṁ na ubhayamantarena.
Ud 1.10

1. Was the word “ubhaya” translated to “between the two”?
2. Could the Pali have been translated to the following and, if not, why?

you won’t be in this world or the world beyond or both.
tato tvaṁ, bāhiya, nevidha na huraṁ na ubhayamantarena.
Ud 1.10

[stephen]

The compound you are asking about consists of two parts,
ubhayam + antara. both + in between.

So put together it’s ‘in between both’ or ‘in between the two’, or possibly ‘nor in between either’.

(With the instrumental case in a somewhat adverbial sense)