Nerve-jangling drive or nerve jangling drive?

Yes, I would use a hyphen.

You keep asking about particular cases involving hyphens. Learn the rules, and you can make your own decisions about them. The answer to this particular question of yours is obvious and not debatable.

Thanks. Could you help with another. In the below sentence, should 'merino wool' be hyphenated in your opinion? I haven't but just wanted to check.

Every now and again she’d wipe the tears away with the sleeve of her grey merino wool cardigan, which turned the fabric into a dampened shade of black.

OK, I was wrong. It's not so clear cut, is it? I would not use a hyphen there, because "merino wool" is like a two-word noun already.

Thanks. Every time I think I've got it figured out, I read something else which makes me think otherwise. Like the below:

'She apologised about the whole bread knife fiasco.'

I believe 'bread knife' should actually be hyphenated. Would you agree?

Were you not happy with the answer you got HERE?

ozzourtiWere you not happy with the answer you got HERE?

Right. That's the same deal as "merino wool".