ὑπονυστάζω
From LSJ
καὶ τῇ ὧν λέγεις καὶ φθέγγῃ ἡρωικῇ ἀληθείᾳ ἀρκούμενος, εὐζωήσεις → and satisfied with heroic truth in every word and sound which you utter, you will live happy
English (LSJ)
A nod a little, fall asleep gradually, Pl.Smp.223d, Plu. 2.178f.
German (Pape)
[Seite 1227] (s. νυστάζω), ein wenig od. leise nicken, allmälig einschlafen; Plat. Conv. 223 d; Philostr.