Usage: 2 forms in 5 verses
Form Translated As     In Verse(s)
κατώδυνοσ in severe pain LXX.1Sam.22.2
pains LXX.2Kgs.4.27
was in severe pain LXX.1Sam.1.10
were in severe pain LXX.1Sam.30.6
κατώδυνοι in severe pain LXX.Judg.18.25

Liddell-Scott-Jones

κατώδυνος (katōdunos) in severe pain G:A

κατώδυνος, ον,

in great pain or affliction, [LXX]

LSJ Scripture Refs: LXX.1Kgs.1.10