ῥιψαύχην
From LSJ
ἑὰν δὲ προσποιούμενος ᾗ τὰ μαθήματά πως ἀπείρως προβάλλων, οὐκ ἔστιν αἰτίας ἔξω → But should one profess knowledge as he puts forward something in an inexperienced way, he is not without blame (Pappus 3.1.30.31f.)
English (LSJ)
ενος, ὁ, ἡ,
A tossing the neck (or head), properly of horses: metaph., ῥιψαύχενι σὺν κλόνῳ Pi.Dith.Oxy.1604 ii 13.
German (Pape)
[Seite 846] ὁ, ἡ, den Nacken werfend, bäumend, b.s. vom Pferde, auch von muthigen, trotzigen, hoffartigen Menschen, ἀλαλαί τε ὀρινόμεναι ῥιψαύχενι σὺν κλόνῳ, Pind. frg. 224.