How to pronounce “haecceity” in English

And so he has this property of haecceity.

So there's something about the original which is so critically important, something about the haecceity of Mouse which makes it irreplaceable.

Now, I've tried to capture that with a sort of graph which shows whether or not you're applying haecceity or quiddity.

And hence, you can see, there's a gradual transition from quiddity towards haecceity.