Usage: 2 forms in 2 verses
Form Translated As     In Verse(s)
πολυχρόνιοσ long-lived LXX.Gen.26.8
πολυχρόνιοί long-lived LXX.Job.32.9

Liddell-Scott-Jones

πολυχρόνιος (poluchronios) long-lived G:A

πολυχρόνιος-χρόνιος, ον,

of olden time, ancient, [Refs]

__2 of long standing, τὴν πολυχρόνιοςχρονίων (to be read -χρόνιον) Μαρμαριτῶν θρασύτητα [Refs 3rd c.AD+]
__II lasting for long, νουσήματα [Refs 5th c.BC+]; opposed to αἰώνιος, [Refs 4th c.BC+]long-protracted, [Refs 1st c.AD+]: comparative, [Refs 5th c.BC+]: superlative, τὰ -ώτατα τῶν ἀνθρωπίνων [Refs 5th c.BC+] adverb -ίως uncertain reading in [Refs 5th c.BC+]
__II.2 long-lived, [Refs 4th c.BC+]: comparative -ώτερος[Refs 5th c.BC+]: superlative -ώτατος, αἷμα [Refs 3rd c.BC+]