Usage: 2 forms in 3 verses
Form Translated As     In Verse(s)
ηνίασ αυτών the LXX.Hab.3.14
their reins LXX.Hab.3.14
ηνίαι reins LXX.Nah.2.3

Liddell-Scott-Jones

ἡνία (hēnia) reins G:N-F

ἡνία,

__BDoric dialect ἁνία, , post-[Refs 8th c.BC+],= {ἡνία}, bridle, reins, in plural, [ἡνίας μάχεσθαι [prev. author] “Pr.” 1010 ">Refs 5th c.BC+]; εἰς τοὐπίσω ἑλκύσαι τὰς . [Refs 5th c.BC+]: the singular for one rein, ἔπειτα λύων . ἀριστεράν [Refs 5th c.BC+]
__B.2 metaphorically, Ἔρως.. ἡνίας ηὔθυνε παλιντόνους [ἡνίας ἔχειν 5th c.BC: Euripides Tragicus “Andromache” 178; ἐφεῖναι καὶ χαλάσαι τὰς ἡ. τοῖς λόγοις 5th-6th c.BC: Plato Philosophus “Protagoras” 338a ">Refs 5th c.BC+]; παραλαβοῦσαι τῆς πόλεως τὰς . [Refs 5th c.BC+]; τούτῳ παραδώσω τῆς πυκνὸς τὰς . [Refs 4th c.BC+]; ἐνδιδόναι τοῖς βουλήμασι τὰς . [Refs 1st c.BC+]; πρὸς ταῖς ., of high officials, [Refs]; ἐπὶ τῶν . [LXX]
__B.3 as a military term, ἐφ᾽ ἡνίαν wheeling to the left (the left being the bridle hand), [ἡνίαν τῷ χαλινῷ 1st-2nd c.AD: Plutarchus Biographus et Philosophus “Marcellus” 6 ">Refs 2nd c.BC+]; ἐξ ἡνίας, opposed to ἐκ δόρατος, [Refs 2nd c.BC+]
__II any leather thong, especially sandal-thong, ἡνίαι Λακωνικαί [Refs 5th c.BC+]