How to pronounce “buttress”(verb) in English

He had $50 billion of spare cash which sort of buttressed his claims-paying appeal.

So what I think is so amazing is that the very same people who were buttressing the iron curtain, making it function, making it possible, were in a position to subvert it

Now, one thing that Powell was insistent on in his memo was they needed to build groups that would buttress the ideological and political power

Instead of doing that, they end up sort of buttressing this image of themselves as the smart kid.