Usage: 5 forms in 5 verses
Form Translated As     In Verse(s)
κατεστέναξαν groaned LXX.Exod.2.23
καταστεναζόντων groaning LXX.Ezek.9.4
καταστενάξεισ you shall groan LXX.Jer.22.23
καταστενάζοντεσ groaning LXX.Lam.1.11
καταστέναξον groan LXX.Ezek.21.6

Liddell-Scott-Jones

καταστενάζω (katastenazō) to groan G:V

καταστενάζω-άζω,

sigh, mourn, [LXX]passive, [Refs 4th c.AD+].

LSJ Scripture Refs: LXX.Exod.2.23