ῥυγχίον
From LSJ
καὶ τὸ σιγᾶν πολλάκις ἐστὶ σοφώτατον ἀνθρώπῳ νοῆσαι → and silence is often the wisest thing for a man to heed, and often is man's best wisdom to be silent, and often keeping silent is the wisest thing for a man to heed
English (LSJ)
τό, Dim. of ῥύγχος, Ar.Ach.744, Theophil.8.2, POxy.108.5 (ii A.D.).
