Liddell-Scott-Jones

κατάδυσις (katadusis) a retreat ^G:N-F

κατάδυσις-δῠσις, εως, ἡ,

dipping: hence, setting, of stars, in plural, [Refs 2nd c.BC+]

__2 of a river, descent into an underground course, [Refs 1st c.BC+]
__3 generally, going down into, descent, [Refs 2nd c.AD+]
__II hiding-place, hole, [Refs 1st c.AD+]
__II.2 depth, [LXX+2nd c.AD+]
__II.3 ={θαλάμη}, [Refs 1st c.AD+]
__III present world (as subject to decline), [LXX+2nd c.AD+]; so of human life, [LXX+2nd c.AD+]
__IV rendering of Hebrew miphleseth 'a thing to shudder at', [LXX]
__V (καταδύω [Refs] ducking of the head in a bath, [Refs 4th c.AD+]

_{LSJ Scripture Refs: LXX.Ps.68.3* ☩ LXX.Ps.16.14* ☩ LXX.Ps.48.2* ☩ LXX.1Kgs.15.13}