Nichtsein
From LSJ
Πυλάδη, σε γὰρ δὴ πρῶτον ἀνθρώπων ἐγὼ πιστὸν νομίζω καὶ φίλον ξένον τ' ἐμοί → Pylades for indeed I consider you, foremost among men, loyal and kind and a host to me (Euripides' Electra 82-83)
Nichtsein, das, non esse (Cic. Tusc. 1, 12). – mors. interitus (Tod, Untergang).