Excerpt from the speech by Hadi Benotto announcing the discoveries at Dar-es-Balat on the planet of Rakis:
[...]
Third, and we believe that this is equal in portent to the actual discovery, there is the storehouse itself. The repository for these journals is an undoubted Ixian artifact of such primitive and yet marvelous construction that it is sure to throw new light on the historical epoch known as "The Scattering." As was to be expected, the storehouse was invisible. It was buried far deeper than myth and the Oral History had led us to expect and it emitted radiation and absorbed radiation to simulate the natural character of its surroundings, a mechanical mimesis which is not surprising in itself. What hyas surprised our engineers, however, is the way this was done with the most rudimentary and truly primitive skills.
I can see that some of you are as excited by this as we were. We believe we are looking at the first Ixian Globe, the no-room from which all such devices evolved.
(herbert, f.
god emperor of dune at 1-2).
and
The existence of no-ships raises the possibility of destroying entire planets without retaliation. A large object, asteroid or equivalent, may be sent against the planet. Or the people can be set against each other by sexual subversion, and then can be armed t odestroy themselves. These Honored Matres appear to favor this latter technique.
--Bene Gesserit Analysis
(herbert, f.
heretics of dune at 22).
there's plenty of other bits, most important among them in-setting are those that indicate a no-field (no-chamber, no-globe, no-ship) renders contents imperceptible by atreides prescient awareness.
the prefix
no-, in genre at least, does not historically negate the item prefixed in itself, but only as to the knowledge arising in others about the prefixed item. safe to assume that the no-god remains a deity of some sort. from its conversations, the no-god lacks self-awareness, apparently, so safe to say that the
no- prefix is self-reflexive.