Usage: 3 forms in 3 verses
Form Translated As     In Verse(s)
μετελθείν it being passed through the ranks LXX.1Sam.5.9
μετελθέτω pass between the ranks LXX.1Sam.5.8
μετήλθε passed between the ranks LXX.1Sam.5.8

Liddell-Scott-Jones

μετέρχομαι (meterchomai) to pass between the ranks G:V

μετέρχομαι,

Aeolic dialect and Doric dialect πεδέρχομαι, [Refs 5th c.BC+]: future μετελεύσομαι [Refs 8th c.BC+]:—come or go among, with dative plural, [Refs 8th c.BC+]participle, μετελθών if he came among them, [Refs 8th c.BC+]; of a leader, στίχας.. Ἄρης ὄτρυνε μετελθών having gone between the ranks, [Refs]

__2 go among with hostile purpose, attack, λέων ἀγέληφι μετελθών [Refs]: with a double construction, βουσὶ μετέρχεται ὀΐεσσιν ἠὲ μετ᾽ ἀγροτέρας ἐλάφους [Refs 8th c.BC+]
__II go to another place, πόλινδε μετέρχεο [Refs 8th c.BC+]; εἰς θεοὺς μ., i.e. die, [Refs 3rd c.BC+]; migrate, change one's abode, [Refs 5th c.BC+]; of a slave, to be transferred, [Refs 3rd c.BC+]
__III follow, come after, εἰ πόνος ἦν, τὸ τερπνὸν πλέον πεδέρχεται Pi. [prev. cited]
__IV go to seek, go in quest of, with accusative person, Πάριν μετελεύσομαι [Refs 8th c.BC+] also with accusative _of things_, πατρὸς κλέος εὐρὺ μετέρχομαι I go to seek tidings of my father, [Refs 8th c.BC+]: generally, seek, [Refs 5th c.BC+]
__IV.2 in hostile sense, pursue, [Refs 8th c.BC+]; in legal sense, prosecute, μ. φονέα [Refs 5th c.BC+]; punish, τινὰς ταῖς ἐσχάταις τιμωρίαις μ. [Refs 4th c.BC+]: with accusative of things, seek to avenge, ὑβρισθέντας γάμους [Refs 5th c.BC+]: with double accusative person et of things, visit a crime upon.., μ. ἁρπαγὰς Ἑλένης Ἰλίου πόλιν [Refs 4th c.BC+]
__IV.3 of things, go after, attend to, ἔργα μετερχόμενος [Refs 8th c.BC+]; prosecute, pursue a business, πρᾶγμα [Refs 5th c.BC+]; μ. ἄλλων πημάτων κακὰς ὁδούς narrate them, [Refs 5th c.BC+]
__IV.4 claim at law, προῖκα ὀφείλεσθαι Mitteis [Refs 2nd c.AD+]; οἱ μετερχόμενοι the claimants, [Refs 2nd c.AD+]
__IV.5 approach with prayer or sacrifice, θεὸν εὐχαῖσιν [Refs 5th c.BC+]infinitive added, ἐγώ σε μ. τῶν θεῶν εἰπεῖν τὠληθές I beseech you by the gods to speak the truth, [Refs 3rd c.BC+]
__IV.6 court, woo a woman, [Refs 5th c.BC+]
__V go over, εἰς Γίτανα [Refs 2nd c.BC+]; of an army, πρὸς τὸν Ἀντωνῖνον μ. [Refs 2nd c.AD+]
__V.2 of honours, pass, descend, εἰς τοὺς παῖδάς τινος [Refs 3rd c.AD+]