I'm editing my dad's book (what kind of mug am I? No need to answer that.)
He had written:
'[x] was directly intermediate between the other two.'
I have changed it, on the grounds of 'intermediate between' being a tautology, to:
'[x] intermediated between the other two.'
However, I'm still not sure whether it's grammatical, let alone elegant. Should I just revert to the original?
I would welcome Senora's input, and also advice from any other fully paid-up pedants.