Lexical Definition

‎ἀπέραντος‎ apérantos (ap-er'-an-tos) endless ^G:A
from ‎Α‎ (as a negative particle) and a secondary derivative of ‎πέραν‎

endless.

• unfinished, i.e. (by implication) interminable

Abbott-Smith

ἀπέραντος, -ον (< περαίνω, to complete, finish), [in LXX: Jb 36:26 (חֵקֶר אֵין), III Mac 2:9*;]
endless, interminable: I Ti 1:4.†

Abbott-Smith References

Liddell-Scott-Jones

ἀπέραντος, ον,

(περαίνω) boundless, infinite, of space, πεδίον[Refs 5th c.BC+]; of time, endless, τὸ χρῆμα τῶν νυκτῶν ὅσον· ἀπέραντον[Refs 5th c.BC+]; of number, countless, infinite, ἀ. ἀριθμὸς ἀνθρώπων[Refs 1st c.AD+]; unlimited, τιμωρίαι[Refs 4th c.BC+]; generally, of events, business, etc., ἀπέραντον ἦν there was no end to it, [Refs 5th c.BC+]; ἀπέραντα περαίνειν represent as concluded what is not concluded, [Refs 2nd c.AD+] (with allusion to signification [Refs 2nd c.BC+]adverb, τὸ ἀπεράντως διεστηκός of unlimited dimensions, [Refs 4th c.BC+]

__II allowing no escape, whence none can pass, Τάρταρος, δίκτυον, [Refs 4th c.BC+]
__III in Logic, inconclusive, λόγος[Refs 1st c.BC+]
__IV incomplete, imperfect, of persons, ἀτελὴς καὶ ἀ.[Refs 2nd c.AD+]