undeterminateness

And this also is against sense, that there is not in the nature of bodies anything either supreme or first or last, in which the magnitude of the body may terminate; but that there is always some phenomenon beyond the body, still going on which carries the subject to infinity and undeterminateness.

Essays and Miscellanies 2004

Its very undeterminateness is a mass in the same sense that of being a recipient of Magnitude — though of course only in the visible object.

The Six Enneads. Plotinus 1952