to fight in single combat , (Euripides); τινι with one, (Herdotus Historicus); of the Athenians at Marathon, μοῦνοι μουνομαχήσαντες τῷ Πέρσῃ having fought single-handed with the Persians, (Herdotus Historicus) (ML)
STRONG'S WORD STUDY
G8345 — μονομαχέω
monomacheō · to fight one on one · Greek