How to pronounce “intractability” in English

He still spent the better part of four decades trying to come to terms with just how screwed up and unfair it is that we only get to do this once.With the intractability and general awfulness of trying to parse the idea of 'once'.Trying to get any kind of handle of it, trying to put it into the equations, isolate into a variable the slippery concept of 'once-ness'.