τρηχαλέος
From LSJ
Ἐς δὲ τὰ ἔσχατα νουσήματα αἱ ἔσχαται θεραπεῖαι ἐς ἀκριβείην, κράτισται → But for extreme illnesses, extreme remedies, applied with severe exactitude, are the best (Hippocrates, Aphorism 6)
English (LSJ)
η, ον, poet. for τρηχύς, Pancrat.Oxy.1085.11, Marc. SId.27, AP5.291.6 (Agath.), 6.63 (Damoch.), 64 (Paul. Sil.), APl. 4.113 (Jul.).
Greek (Liddell-Scott)
τρηχᾰλέος: -η, -ον, ποιητ. ἀντὶ τρηχύς, τραχύς, Ἀνθ. Π. 5. 292., 6. 63, 64, Πλαν. 113.