What part of “nothing” don’t you understand?

Edward Feser responding to a Science article about the start of the universe: Edward Feser: What part of “nothing” don’t you understand?:

So what’s the point of all this ado about nothing? You know what the point is: To try to show that physics alone can explain the existence of the universe. Hence the key line of the piece: “Perhaps the big bang was just nothingness doing what comes naturally.” But read in a straightforward way, this is just nonsense, for reasons of the sort already given: If this so-called “nothingness” has a “nature” and “does” things, then it isn’t really “nothingness” at all that we’re talking about. And of course, the article and the physicists it quotes don’t really mean “nothingness” in a straightforward way in the first place.