Abbott-Smith Manual Greek Lexicon
σιωπάω (G4623)
10 σιωπάω , -ῶ ( σιωπή , silence ) [in LXX for חשׁה , חרשׁ hi., etc. ;] to be silent or still, keep silence : Mt 20:31 26:63 , Mk 3:4 9:34 10:48 14:61 , Lk 19:4 , Ac 18:9 ; of one dumb, Lk 1:20 (cf. IV Mac 10:18 ); addressed rhetorically to the sea, σιώπα , Mk 4:39 .† SYN. : ἡσυχάζω , σιγάω (q.v.).
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain