Usage: 4 forms in 4 verses
Form Translated As     In Verse(s)
κατεσιώπων quelled LXX.Neh.8.11
κατεσιώπησεν quelled LXX.Job.39.17
κατεσιώπησε Caleb quelled LXX.Num.13.30
κατασιωπήσω I should quell LXX.Job.37.20

Liddell-Scott-Jones

κατασιωπάω (katasiōpaō) to observe silence G:V

κατασιωπάω-άω,

keep silence, [Refs 5th c.BC+].

__2 with accusative of things, keep silent, pass over, [Refs 1st c.BC+]:—passive, [Refs 5th c.BC+]
__3 condemn by silence, [Refs 1st c.AD+].
__II causal, make silent, silence, [Refs 6th c.BC+] —middle, cause silence, [Refs 5th c.BC+].