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.12.9Rev.20.2
ἀρχαῖα old things 2Cor.5.17
ἀρχαίῳ an early Acts.21.16
ἀρχαίων ancients Luke.9.8Luke.9.19
early Acts.15.7
of old Acts.15.21
ἀρχαίου ancient 2Pet.2.5
ἀρχαίοισ ancients Matt.5.21Matt.5.27Matt.5.33
αρχαίων ancient LXX.1Kgs.4.30LXX.Isa.37.26LXX.Lam.1.7
of old LXX.Ps.79.8LXX.Ps.143.5LXX.Lam.2.17
αρχαίον ancient LXX.Isa.23.17
αρχαίασ about ancient LXX.Ps.77.5
ancient LXX.Isa.22.9LXX.Isa.22.11
αρχαίαν ancient LXX.Isa.25.1LXX.Ezek.21.21
αρχαίαισ ancient LXX.Ps.44.1
old LXX.Jer.46.26
αρχαία ancient LXX.1Sam.24.13LXX.Ps.89.49LXX.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 . ῥέεθον[Refs 5th c.BC+]; οἱ ., 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+]; . θεαί, of the Erinyes, [Refs 5th c.BC+]; οἱ . 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 ., of Darius, [Refs 5th c.BC+]; οἱ . κύριοι the original owners, [Refs 2nd c.BC+]; τὰς . πόλεις (banished from) their original cities, [Refs] W.; . μαθητής an original disciple, [NT] παιδαγωγὸς ., 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 . 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 .[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, , ={ἀρχή}, [Refs]

LSJ Scripture Refs: Matt.5.21Acts.21.16