Usage: 2 forms in 2 verses
Form Translated As     In Verse(s)
αντιδικών pleading LXX.Judg.12.2
αντεδίκησεν pleaded LXX.Judg.6.31

Liddell-Scott-Jones

ἀντιδικέω (antidikeō) to plead G:V

ἀντιδικέω-έω,

imperfect ἠντιδίκουν[Refs 5th c.BC+]: aorist ἠντεδίκησα[Refs]:—to be an ἀντίδικος, dispute, go to law, περί τινος[Refs 5th c.BC+]the parties to a suit, [Refs 5th c.BC+]: absolutely, of the defendant, ἀντιδικῶν[Refs 5th c.BC+]; . πρός τι or πρός τινα to urge one's suit against.., [Refs 4th c.BC+]; join issue, ἠντιδίκει μήν.., with accusative et infinitive, Lys.[same place]; oppose, rebut, διαβολαῖς[Refs 4th c.BC+]; ἀλλήλοις probably in Thugen.I[Refs 4th c.BC+]

__II passive, to be an object of dispute, Phot.p.147R.