ὑψηχής
From LSJ
πέτρην κοιλαίνει ρανὶς ὕδατος ἐνδελεχείῃ → constant dropping wears away a stone, constant dripping will wear away the hardest stone, little strokes fell big oaks, constant dripping wears the stone, constant dropping wears the stone, constant dripping will wear away a stone
English (LSJ)
ές, (ἦχος)
A making a loud or ringing sound, ὑψηχέες ἵπποι, because of their loud neighing, or their 'high-resounding pace' (cf. ἐρίγδουπος), Il.5.772 (v.l. ὑψαύχενες ap.Longin.), 23.27; τὸ ὑ. τῶν λόγων Philostr. VS1.25.7.