Usage: 2 forms in 3 verses
Form Translated As     In Verse(s)
αενάων of everlasting LXX.Deut.33.15LXX.Deut.33.27
αένναοσ everlasting LXX.Job.19.25

Liddell-Scott-Jones

ἀέναος (aenaos) everlasting G:A

ἀέναος-νᾰος [-], ον,

(νάω Α) ἀέναοςνναος[Refs 5th c.BC+]; contraction ἀείνως [Refs 5th c.BC+]: Trag. only in Lyric poetry:—ever-flowing, κρήνης τ᾽ ἀενάου καὶ ἀπορρύτου[Refs 8th c.BC+]; . λίμνη, ποταμός, [ἀέναοςναοι νεφέλαι [prev. author] “Nu.” 275">Refs 5th c.BC+];—generally, everlasting, ἀρετᾶς.. κόσμον ἀέναοςναόν τε κλέος[Refs 4th c.BC+]; . τιμά, of Zeus, [Refs 5th c.BC+]; ἀενάοις ἐν τραπέζαις, of public hospitality, [Refs 5th c.BC+]; γλῶτταν καλῶν λόγων ἀείνων Cratin.[same place]:—also in Prose, κλέος[ἀέναοςναον οὐσίαν πορίσαι 5th-6th c.BC: Plato Philosophus “Leges” 966e; ἀ. ποταμῶν ἀμήχανα μεγέθη [prev. author] “Phd.” 111d, compare 4th c.BC: Aristoteles Philosophus “Meteorologica” 349b9; θῖνες LXX.Bar.5.7; ἀέναοςνναοι τῶν θεῶν πρόσοδοι 5th c.AD: Proclus Philosophus “Inst.” 152">LXX+5th c.BC+]. adverb ἀενάως[Refs 4th c.BC+]