Usage: 6 forms in 42 verses
Form Translated As     In Verse(s)
πολεμιστών of war LXX.Deut.2.14
warrior LXX.Num.31.42LXX.Num.31.49
warriors LXX.Num.31.27LXX.Num.31.28LXX.1Sam.30.22LXX.2Kgs.25.19LXX.Jer.52.25
πολεμισταίσ of warriors LXX.2Chr.13.3
πολεμισταί her warriors LXX.Jer.50.30
of war LXX.Joel.2.7LXX.Joel.3.9
of your warriors LXX.Ezek.27.10
warrior LXX.Num.31.32LXX.Num.31.53
warriors LXX.Deut.2.16LXX.Judg.20.17LXX.1Kgs.9.22LXX.1Chr.12.38LXX.2Chr.8.9LXX.2Chr.13.3LXX.2Chr.14.8LXX.2Chr.17.13LXX.2Chr.28.14LXX.Jer.39.4LXX.Jer.51.32LXX.Jer.52.7
your warriors LXX.Jer.49.26LXX.Ezek.27.27
πολεμιστήσ a warrior LXX.1Sam.16.18LXX.2Sam.17.8
of war LXX.Josh.17.1LXX.1Sam.17.33LXX.1Chr.28.3
warrior LXX.Josh.8.11LXX.Josh.10.7LXX.Josh.11.7
warriors LXX.Josh.8.3
πολεμιστήν warrior LXX.2Chr.32.21LXX.Isa.3.2LXX.Ezek.39.20
πολεμιστάσ warriors LXX.Jer.41.3

Liddell-Scott-Jones

πολεμιστής (polemistēs) a warrior G:N-M

πολεμιστής-ιστής, οῦ, ,

Epic dialect πτολ- [Refs 8th c.BC+]:— warrior, [Refs 5th c.BC+]: frequently in later Prose, [LXX+1st c.BC+]

__II π. ἵππος war-horse, charger, [Refs 1st c.BC+]; ἵπποι π. are probably racehorses trapped as chargers, [Refs 3rd c.BC+]

LSJ Scripture Refs: LXX.Deut.2.14