συστρέφεσθαι
From LSJ
αἰθὴρ δ᾽ ἐλαφραῖς πτερύγων ῥιπαῖς ὑποσυρίζει (Aeschylus, Prometheus Bound 126) → The bright air fanned | whistles and shrills with rapid beat of wings.
Greek > English (Woodhouse Verbs Reversed)
(see also συστρέφω): be massed together, close ranks, gather oneself together
