μεσιδιόω
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)
A deposit with a neutral party or trustee, χειρόγραφόν τινι PRein.7.22 (ii B. C.):—Pass., ib. 32, SIG633.87 (Milet., ii B. C., written μεσειδ-): condemned by Phryn.98.