Lexical Definition

‎אֵיתָן‎ ʼêythân (ay-thawn') strong ^H:A
or (shortened) אֵתָן ʼêthân (ay-thawn') ; from an unused root (meaning to continue)

hard, mighty, rough, strength, strong.

• permanence
• hence (concrete) permanent
• specifically a chieftain

1) perpetual, constant, perennial, ever-flowing
1a) ever-flowing (of a stream)
1b) permanence, permanent, enduring (fig.)

See Greek: δυνάστης · ἰσχυρός · κράτος · τραχύς · χώρα

Brown-Driver-Briggs

I. ‎אֵיתָן‎, ‎אֵתָן‎ adjective perennial, ever-flowing, figurative permanent, as substantive steady flow, permanence; — absolute ‎אֵיתָן‎ Gen 49:24 + 8 t.; ‎אֵתָן‎ Job 33:19 suffix ‎אֵיתָנוֺ‎ Exod 14:27 plural ‎אֵיתָנִים‎ Job 12:19 ‎אֵתָנִים‎ 1Kgs 8:2; Mic 6:2 (in form, an 'elative,' Ew^{§ 162 b} = Arabic comparative and superlative); —

1. ever-flowing (opposed to ‎אַכְזָב‎), ‎נַחַל אֵיתָן‎ Amos 5:24 an ever-flowing wady, Deut 21:4 (see Dr); as substantive in ‎נַהֲרוֺת אֵיתָּן‎ Ps 74:15 rivers of steady flow; as substantive also Exod 14:27 (J), the sea returned ‎לְאֵיתָנוֺ‎ to its steady flow, ‎יֶרַת הָאֵיתָנִים‎ 1Kgs 8:2 month of steady flowings = 7th mo., Oct.-;Nov. (post-Biblical Tisri).

2. figurative permanent, enduring ‎גּוֺי אֵיתָן הוּא‎ Jer 5:15, i.e. a nation whose numbers never dwindle or fail, imperishable, ‎׳‎‎וְרִיב עֲצָמָיו א‎ Job 33:19 Kt the strife of his bones is constant, Gen 49:24 his bow abode ‎׳‎‎בְּא‎ as an enduring, firm, one, ‎מוֺשָֽׁבְךָ‎ ‎׳‎‎א‎ Num 24:21 (|| ‎שִׂים בַּסֶּלַע‎), ‎נְוֵה אֵיתָן‎ Jer 49:19 = Jer 50:44 an abode of permanency (of Edom, and Babylon, suddenly depopulated by foe, figured as lion); ‎האיתנים מוסדי ארץ‎ Mic 6:2 ye ever-enduring ones, the foundations of the earth (but read probably with We ‎הַאֲזִינוּ‎), Job 12:19 ‎אֵיתָנִים יְסַלֵּף‎ he subverteth them that are firmly seated (i.e. men established in hereditary offices or dignities). Very uncertain is Prov 13:15 ‎דֶּרֶךְ בִּגְדִים אֵיתָן‎, perhaps firm, hard, rugged (Ew De Hi Now ^{according to} Str. the text is corrupt).

Brown-Driver-Briggs References