ὑψηχής
From LSJ
ἀσκέειν, περὶ τὰ νουσήματα, δύο, ὠφελέειν, ἢ μὴ βλάπτειν → strive, with regard to diseases, for two things — to do good, or to do no harm | as to diseases, make a habit of two things — to help, or at least, to do no harm
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.