Extended Strong's Greek Lexicon (Abbott-Smith based)
be quiet
Usage: σιωπάω, -ῶ (σιωπή, silence) [in LXX for חָשָׁה, חָרַשׁ hi., etc. ;] to be silent or still, keep silence: Mat.20:31 26:63, Mrk.3:4 9:34 10:48 14:61, Luk.19:4, Act.18:9; of one dumb, Luk.1:20 (cf. 4Ma.10:18); addressed rhetorically to the sea, σιώπα, Mrk.4:39.† SYN.: ἡσυχάζω, σιγάω (which see) (AS)