Quoting Benct Philip Jonsson <[log in to unmask]>:

> Andreas Johansson skrev:
> > Mightn't it be so simple as them saying "adverb" where they mean
> "adverbial"?
> >
> Unfortunately I'm afraid 'adverbial' as a noun for a syntactic
> subdivision is a Swedish(TM) usage...

Ah. You seem to be right.

Well, clearly, then, we've discovered a point where English could be improved by
a Swedish loan!