ἀποσυρίζω
From LSJ
ἄνω ποταμῶν ἱερῶν χωροῦσι παγαί → the springs of sacred rivers flow upward, backward to their sources flow the streams of holy rivers
English (LSJ)
A whistle aloud for want of thought, or to show indifference, μάκρ' ἀποσυρίζων h.Merc.280:—Pass., sound like whistling, Luc. VH2.5.
German (Pape)
[Seite 328] (συρίζω), auspfeifen, μάκρ' ἀποσ., laut pfeifen, H. h. Merc. 280; aber ἀπὸ τῶν κλάδων μέλη ἀπεσυρίζετο, sie ertönten säuselnd von den Aesten herab, Luc. V. Hist. 2, 5.