Liddell-Scott-Jones

σιωπή (siōpē) silence ^G:N-F

σιωπή-ή,

rarely σωπή (which see), ἡ, silence, [Refs 5th c.BC+]; σ. ποιεῖν, ποιεῖσθαι, [Refs 5th c.BC+]; ἦν σ. there was a hush or calm, [Refs 5th c.BC+]. inglorious silence is their lot who make no venture, [Refs 5th c.BC+]

__2 the habit of silence, ἐκ τῆς σ. τὴν τῆς σωφροσύνης δόξαν θηρᾶσθαι [Refs 4th c.BC+]
__II dative σιωπῇ as adverb, in silence, the only case used by [Refs 8th c.BC+]; ἐπ᾽ ὀφρύσι νεῦσε σ. made a sign without speaking,[Refs 8th c.BC+]; στῆναι, πορεύεσθαι, καθῆσθαι σ., [Refs 5th c.BC+]; secretly, [Refs 8th c.BC+]