Usage: 4 forms in 11 verses
Form Translated As     In Verse(s)
πολεμικόν of warfare LXX.Zech.9.10
πολεμικοίσ for warfare LXX.1Chr.12.33 • LXX.1Chr.12.37
of warfare LXX.Ezek.32.27
πολεμική for warfare LXX.2Chr.26.13
πολεμικά for his warfare LXX.Deut.1.41 • LXX.1Sam.8.12
for their warfare LXX.Judg.18.16
for warfare LXX.Judg.18.17
of warfare LXX.2Sam.1.27 • LXX.Jer.21.4

Liddell-Scott-Jones

πολεμικός (polemikos) warfare G:A

πολεμικός-ικός, ή, όν,

of or for war, οἱ π. κίνδυνοι [Refs 5th c.BC+]; ἀγῶνες π., opposed to εἰρηνικοί, [Refs 5th c.BC+]; χαλκῆν ἀσπίδα -ωτάτην εἶναι most fit for service, [Refs 5th c.BC+]; τέχνη καὶ ἐπιστήμη π. [Refs 5th c.BC+]; ἡ -κή (i.e. τέχνη) the art of war, [Refs]; τὰ -κά warlike exercises, τὰ π ἄλκιμος (variant{πολέμια}) [Refs 5th c.BC+]

__2 τὸ -κόν signal for battle (παιὼν π. in [Refs 5th c.BC+]; ἀνέκραγε πολεμικόςικόν gave a war-shout, [Refs 5th c.BC+]; also of an air on the flute, Tryphoap.[Refs 2nd c.AD+]
__2.b fighting part of the people, opposed to civilians, [Refs 4th c.BC+]
__II of persons, skilled in war, warlike, [Refs 5th c.BC+]warlike spirit, [Refs 1st c.BC+]
__III like an enemy, hostile, [Refs 5th c.BC+]; stirring up hostility, opposed to φιλικός, πολεμικόςικὸν ἔρις καὶ ὀργή [Refs 1st c.AD+] adverb -κῶς, ἔχειν, opposed to εἰρηνικῶς,[Refs 5th c.BC+]: superlative -ώτατα, ἔχειν πρός τινα [Refs 5th c.BC+]