εἴσφυσις
From LSJ
τὸν θάνατον τί φοβεῖσθε, τὸν ἡσυχίης γενετῆρα, τὸν παύοντα νόσους καὶ πενίης ὀδύνας → why fear ye death, the parent of repose, who numbs the sense of penury and pain
Greek (Liddell-Scott)
εἴσφυσις: -εως, διαφ. γρ. ἐν Ἀριστ. περὶ τὰ Ζ. Ἱστορ. 10, 5, ἀντὶ εἰ φύσις.
Russian (Dvoretsky)
εἴσφυσις: εως ἡ сращенность Arst.