Lexical Definition

‎τοιγαροῦν‎ toigaroûn (toy-gar-oon') therefore G:CONJ
from ‎τοί‎ and ‎γάρ‎ and ‎οὖν‎

there-(where-)fore.

Usage: 2 forms in 7 verses
Form Translated As     In Verse(s)
τοιγαροῦν So then 1Thess.4.8
Therefore Heb.12.1
τοιγαρούν Accordingly LXX.Job.22.10LXX.Job.24.22LXX.Prov.1.26LXX.Prov.1.31LXX.Isa.5.26

Abbott-Smith

τοι-γαρ-οῦν an inferential particle, [in LXX: Jb 22:10 24:22 (עַל־כֵּך), Si 41:16, al. ;]
wherefore then, so therefore: I Th 4:8, He 12:1 (Hdt., Plat., al.).†

Abbott-Smith References

Book Refs
Job 22:10 · 24:22
1 Thessalonians 4:8
Hebrews 12:1

Liddell-Scott-Jones

τοιγαροῦν,

an inferential Particle, therefore, accordingly, well then, κέλεαί με.. μυθήσασθαι μῆνιν Ἀπόλλωνος.. · τοιγὰρ ἐγὼν ἐρέω [Refs 8th c.BC+]; rare in Comedy texts [Refs 5th c.BC+]; never in Attic dialect Prose.

__II strengthened by other Particles, τοιγαροῦν, Ionic dialect τοιγαρῶν, for that very reason, therefore, [Refs 5th c.BC+]; also in Poets, as [Refs 5th c.BC+]
__II.2 τοιγαροῦντοι, [Refs 5th c.BC+]; rare in Poets, [τοιγαροῦν">Refs 8th c.BC+] and τοι, τοιγὰρ ἐγώ τοι [Refs 8th c.BC+] —These forms must begin the sentence, except in late Gr., where τοιγαροῦν may be postponed, as [Refs 2nd c.AD+]