ὑφίεσθαι
From LSJ
λίγεια μινύρεται θαμίζουσα μάλιστ' ἀηδών → the sweet-voiced nightingale mourns constantly, the sweet-voiced nightingale most loves to warble
Greek > English (Woodhouse Verbs Reversed)
(see also ὑφίημι): abate, shorten sail, become humble, tone down