ὑπέρτον-ος · hyperton-os — LSJ
strained to the utmost, at full pitch, exceeding loud, γήρυμα A. Eu. 569; βοά Ar. Nu. 1154 (lyr.), Phryn.Com. 46 (lyr.): metaph., δύναμις ὑ. Plu. Fab. 19; ὑ. τῷ κόπῳ Hippiatr. 10.
ὑπέρτονον (sc. ξύλον), τό, main-beam, EM 576.16, Eust. 249.20, 780.28. (Cf. διάτονος.)