Lexical Definition

‎ἀρχαῖος‎ archaîos (ar-khah'-yos) ancient G:A
from ‎ἀρχή‎

(them of) old (time).

Usage: 12 forms in 30 verses
Form Translated As     In Verse(s)
ἀρχαῖοσ ancient Rev.12.9 • Rev.20.2
ἀρχαῖα old things 2Cor.5.17
ἀρχαίῳ an early Acts.21.16
ἀρχαίων ancients Luke.9.8 • Luke.9.19
early Acts.15.7
of old Acts.15.21
ἀρχαίου ancient 2Pet.2.5
ἀρχαίοισ ancients Matt.5.21 • Matt.5.27 • Matt.5.33
αρχαίων ancient LXX.1Kgs.4.30 • LXX.Isa.37.26 • LXX.Lam.1.7
of old LXX.Ps.79.8 • LXX.Ps.143.5 • LXX.Lam.2.17
αρχαίον ancient LXX.Isa.23.17
αρχαίασ about ancient LXX.Ps.77.5
ancient LXX.Isa.22.9 • LXX.Isa.22.11
αρχαίαν ancient LXX.Isa.25.1 • LXX.Ezek.21.21
αρχαίαισ ancient LXX.Ps.44.1
old LXX.Jer.46.26
αρχαία ancient LXX.1Sam.24.13 • LXX.Ps.89.49 • LXX.Isa.43.18
former LXX.Ps.139.5

Abbott-Smith

ἀρχαῖος, -αία, -αῖον (< ἀρχή), [in LXX chiefly for קֶדֶם;]
original, ancient: Mt 5:21, 33, Lk 9:8, 19, Ac 15:7, 21 21:16, II Co 5:17, II Pe 2:5, Re 12:9 20:2.†
SYN.: παλαιός, old, without the reference to beginning and origin contained in ἀ. The distinction is observed in π. (MM, s.v.). ἀ. is the antithesis to καινός: παλ. to νέος (v. Westc., He., 223; Cremer, 116).

Abbott-Smith References

Book Refs
Matthew 5:21 · 5:33
Luke 9:8 · 9:19
Acts 15:7 · 15:21 · 21:16
2 Corinthians 5:17
2 Peter 2:5
Revelation 12:9 · 20:2

Liddell-Scott-Jones

ἀρχαῖος, α, ον,

(ἀρχή I) from the beginning or origin:

__I mostly of things, ancient, σκότος[Refs 5th c.BC+]; χερὸς σῆς πίστιν ἀρχαίαν faith firm for ever, [Refs]
__I.2 old-fashioned, antiquated, [Refs 5th c.BC+]; of literary style, [Refs 4th c.BC+]
__I.2.b simple, silly, [Refs 5th c.BC+]
__I.3 ancient, former, τὸ ἀ. ῥέεθον[Refs 5th c.BC+]; οἱ ἀ., opposed to οἱ ὕστερον, [Refs 5th c.BC+]
__I.4 old, worn out, ὑποδήματα[Refs 5th c.BC+]
__II of persons, Θέμιν.. ἀρχαίαν ἄλοχον Διός[Refs 5th c.BC+]; ἀ. θεαί, of the Erinyes, [Refs 5th c.BC+]; οἱ ἀ. the Ancients, name given by [Refs 4th c.BC+] to the pre-Socratics, [Refs]; in Lit. Crit., ancient, classical writers, [Refs 4th c.BC+], the philosophers down to Aristotle, [Refs]; in NT, the Fathers, [NT]
__II.2 ancient, old, βαλὴν ἀ., of Darius, [Refs 5th c.BC+]; οἱ ἀ. κύριοι the original owners, [Refs 2nd c.BC+]; τὰς ἀ. πόλεις (banished from) their original cities, [Refs] W.; ἀ. μαθητής an original disciple, [NT] παιδαγωγὸς ἀ., i.e of old, formerly, [Refs 5th c.BC+]
__III neuter as adverb, τὸ ἀρχαῖον, Ionic dialect contraction τὠρχαῖον, anciently, [Refs 5th c.BC+], Attic dialect τἀρχαῖον[Refs 5th c.BC+]
__III.2 regular adverb ἀρχαίως in olden style, καινὰ ἀ. λέγειν[Refs 5th c.BC+]
__IV irregular comparative ἀρχαιέστερος[Refs 5th c.BC+]; usual comparative -ότερος[Refs 5th c.BC+]: superlative -ότατος[Refs 5th c.BC+]
__V as substantive, τὸ ἀρχαῖον, of money, prime cost, πλέον τοῦ ἀ.[Refs 5th c.BC+]; principal, mostly in plural, [Refs 5th c.BC+]; τῶν ἀρχαίων ἀπέστησαν lost their capital, [Refs]; opposed to πρόσοδοι, [Refs 4th c.BC+]
__V.2 ἀρχαίη, ἡ, ={ἀρχή}, [Refs]

LSJ Scripture Refs: Matt.5.21 ☩ Acts.21.16