Does this American say opportunity as 'oppor-chun-ity'?

It sounds like CHUNE to me.

A lot of what he hear is actually corrected by our brains.

The word HER is a great example. It can pronounced as 'ah'. When you tell people that the word her can be pronounced as ah they don't believe you.

But if someone were to say 'Mary? I spoke to-ah yesterday' your brain would say 'he said her' but he didn't.

Offer-toonity or offor-chun-ity?