I have to reject this to let Rene's amendment through. I'll append the comment.

See below.

I can see where you are coming from in your comment "I've come round to the view that just one of quite a lot of 一体 + XXX constructions" in respect of my rejected submission for "一体なせ".

In view of that, I am wondering if this main entry could have the addition of an explanation like the following:-

gives the expressions like:...the heck, …the world, ...on earth, and followed by various question words, like, なに,　なせ,　どれ, in order to give (e.g. "what the heck?"); (e.g. "why in the world?"); (e.g. "who on earth?")

Something like that may help the novice who is searching for such expressions.