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
shock of earthquake: P. and V. σεισμός, ὁ.
Met., hesitation: P. and V. ὄκνος, ὁ.