σῐωπ-ή · siōp-ē — LSJ
silence, S. OT 1075, Fr. 928, E. Hipp. 911; σ. ὑπεσημάνθη Th. 6.32; σ. ποιεῖν, ποιεῖσθαι, X. HG 6.3.10, Isoc. 12.234; ἦν σ. there was a hush or calm, S. OC 1623, Aeschin. 2.35: pl., τῶν ἀπειράτων ἄγνωστοι σ. inglorious silence is their lot who make no venture, Pi. I. 4(3).30 (48).
the habit of silence, ἐκ τῆς σ. τὴν τῆς σωφροσύνης δόξαν θηρᾶσθαι D. 61.21, cf. Plu. Aud. 2.39b, etc.
dat. σιωπῇ as Adv., in silence, the only case used by Hom., ἀκὴν ἐγένοντο σιωπῇ Il. 3.95, etc.; σ. ἧσο 4.412; ἐπʼ ὀφρύσι νεῦσε σ. made a sign without speaking, 9.620; σ. πίνειν Od. 1.339; σ. πάσχειν ἄλγεα 13.309, cf. Pi. P. 4.57; στῆναι, πορεύεσθαι, καθῆσθαι σ., E. HF 930, X. Cyr. 5.3.43, D. 48.31; secretly, Il. 14.310; σιωπῇ τοῦτʼ ἀκύρωτον μένει E. Ion 801, cf. Ar. Eq. 1212.