Ὑποκείμενον, “being-at-hand,” the “at-hand-ness” of something. This being-character is connected with being in the sense of the customary meaning. It means what is there not only as being-there, but it also means what is there in the sense of that upon which the estate rests, for example, land, earth, sky, nature, trees, what is at hand in the sense of the beings with which concrete life scrapes out its existence (Dasein). Οὐσία—thus at-hand-ness, without I myself needing to do anything vis-à-vis the being of these beings that are there. [Heidegger  , GA18:34]