Lexical Definition

‎ἀργός‎ argós (ar-gos') idle ^G:A
from ‎Α‎ (as a negative particle) and ‎ἔργον‎

barren, idle, slow.

• inactive, i.e. unemployed
• (by implication) lazy, useless

Abbott-Smith

ἀργός, -όν (in late Gk., incl. NT, -ή, -όν; < ἀ- neg., ἔργον), [in LXX: III Ki 6:7 (מַסָּע?), Wi 14:5 15:15, Si 37:11 38:28*;]
inactive, idle: Mt 20:3, 6, I Ti 5:13, Tit 1:12, II Pe 1:8. Metaph., of things, inactive, ineffective, worthless: ῥῆμα, Mt 12:36; πίστις, Ja 2:20 (v. Cremer, 259 f.).†
SYN.: βραδύς, slow; νωθρός, sluggish (Tr., Syn., § civ).

Abbott-Smith References

Liddell-Scott-Jones

ἀργός, όν,

__Blater ή, όν [Refs 4th c.BC+]:—properly not working the ground, [Refs 5th c.BC+]; idle, lazy, opposed to ἐργάτις, [Refs 6th c.BC+]; ἀ. τὴν διάνοιαν[Refs 5th c.BC+]; ἂν ἀ. ᾖ if he have no trade, [Refs 4th c.BC+]: with genitive of things, idle at a thing, free from it, τῶν οἴκοθεν from domestic toils, [Refs 5th c.BC+]; ἀ. αἰσχρῶν slow to evil, [Refs 5th c.BC+]
__B.2 of things, δόρυ[Refs 5th c.BC+]; of money, lying idle, yielding no return, opposed to ἐνεργός, [Refs 4th c.BC+] and 20; of land, lying fallow, [Refs 5th c.BC+]; opposed to πεφυτευμένος, [Refs 3rd c.AD+]; διατριβὴ ἀ. in which nothing is done, fruitless, [Refs 5th c.BC+]. adverb ἀργῶς, ἐπιμέλεσθαι[Refs 5th c.BC+]
__B.2.b ἀ. λόγος, name of a sophism, [Refs 3rd c.BC+]
__B.II passive,unwrought, ἁρμός, κυμάτιον, [Refs]unprepared for eating, [Refs 5th c.BC+]; βύρσαι undressed hides, [Refs 2nd c.BC+]; unpolished, [Refs 4th c.BC+]
__B.II.2 not done, left undone, κοὐκ ἦν ἔτ᾽ οὐδὲν ἀ.[Refs 5th c.BC+]; οὐκ ἐν ἀργοῖς not among things neglected, [Refs 6th c.BC+]
__B.II.3 unattempted, μάχη[Refs 5th c.BC+]
__B.II.4 Astrology texts, τόπος ἀ., name of the [Refs 2nd c.AD+]