ὑπονόστησις
From LSJ
καὶ ὑποθέμενος κατὰ τῆς κεφαλῆς φέρειν τὰς πληγάς, ὡς ἐν ἐκείνῃ τοῦ τε κακοῦ τοῦ πρὸς ἀνθρώπους → and having instructed them to bring their blows against the head, seeing that the harm to humans ... (Josephus, Antiquities of the Jews 1.50)
English (LSJ)
εως, ἡ,
A retirement, sinking, subsiding, θαλάσσης Plu. Ant.3; of the Nile, Hld.9.22 (pl.); ὑ. ἀέρος εἰς γῆν, as a definition of an earthquake, Anaxag. ap. D.L.2.9; τοῦ θερμοῦ Gal.1.689: metaph., ἀλαζονείας Ph.Fr.102 H.
German (Pape)
[Seite 1227] ἡ, Rückkehr, – das Heruntergehen, Sinken, Plut. Ant. 3; καὶ αὐξήσεις, vom Nil, Mel. 9, 23.