Lexical Definition

‎ἄσπονδος‎ áspondos (as'-pon-dos) irreconcilable ^G:A
from ‎Α‎ (as a negative particle) and a derivative of ‎σπένδω‎

implacable, truce-breaker.

• literally, without libation (which usually accompanied a treaty), i.e. (by implication) truceless

Abbott-Smith

* ἄσπονδος, -ον (< σπονδή, a libation);
1. without truce (Thuc.).
2. admitting of no truce, implacable (Dem., al.): II Ti 3:3.†

Abbott-Smith References

Liddell-Scott-Jones

ἄσπονδος-ος, ον,

without σπονδή or drink-offering: hence,

__I of a god, to whom no drink-offering is poured, ἄ. θεός, i.e. death, [Refs 5th c.BC+]
__II without a regular truce (ratified by σπονδαί), ἀνοκωχή[Refs 5th c.BC+]; of persons, without making a truce, ἄ. ἀπιέναι[Refs]; ἀσπόνδους τοὺς νεκροὺς ἀνελέσθαι take up their dead without leave asked, [Refs]; τὸ εὐπρεπὲς ἄσπονδοςον the specious plea of neutrality, [Refs]
__II.2 admitting of no truce, implacable, ἄσπονδοςόν τ᾽ Ἄρη (ἀράν codices) [Refs 5th c.BC+]; of persons, implacable, [NT]. adverb -δως, ἔχειν[Refs 1st c.AD+]

_{LSJ Scripture Refs: 2Tim.3.3}