Usage: 1 form in 8 verses
Form Translated As     In Verse(s)
διακενήσ ineffectual LXX.Ps.31.6
ineffectually LXX.Lev.26.16LXX.Job.6.5
without cause LXX.Job.2.3LXX.Job.9.17LXX.Job.22.6LXX.Ps.25.3LXX.Prov.23.29

Liddell-Scott-Jones

διακενῆς (diakenēs) ineffectual TEGMC

διακενῆς-κενῆς

or better διὰ κενῆς (i.e. πράξεως), adverb in vain, idly, to no purpose, [Refs 5th c.BC+]