Lexical Definition

‎ἔθω‎ éthō (eth'-o) to have a custom G:V
a primary verb

be custom (manner, wont).

Usage: 3 forms in 5 verses
Form Translated As     In Verse(s)
εἰώθει He had been accustomed Mark.10.1
had been accustomed Matt.27.15
εἰωθὸσ being customary Luke.4.16Acts.17.2
ειωθόσ accustomed way LXX.Num.24.1

Abbott-Smith

ἔθω, pf. with pres. sense εἴωθα, [in LXX: Nu 24:1 (כְּפַעַם־בְּפַעַם), Da LXX Su 13, Si 37:14, IV Mac 1:12 * ;]
to be accustomed, wont: Mt 27:15, Mk 10:1; ptcp., τὸ εἰωθός, custom: κατὰ τὸ εἰ. (Nu, l.c.), Lk 4:16, Ac 17:2.†

Abbott-Smith References

Book Refs
Numbers 24:1
Matthew 27:15
Mark 10:1
Luke 4:16
Acts 17:2

Liddell-Scott-Jones

ἔθω,

to be accustomed, to be wont: present only in participle, κακὰ πόλλ᾽ ἕρδεσκεν ἔθων much ill he wrought after his wont, [ἔθων">Refs 8th c.BC+] as, ={βλάπτων},{φθείρων} (and it was so used by [Refs 3rd c.BC+]: perfect εἴωθα [Refs 8th c.BC+], Epic dialect and Ionic dialect ἔωθα [Refs], is used as present; pluperfect εἰώθειν, Ionic dialect ἐώθεα, as imperfect; participle εἰωθώς, Ionic dialect ἐωθώς, also in [Refs 5th c.BC+]; Doric dialect 3rd.pers. plural perfect ἐθώκατι [Refs 5th c.AD+]: mostly with infinitive, [Refs 8th c.BC+] as is the custom, [Refs 5th c.BC+]: frequently absolutely in participle, of persons, accustomed, customary, usual, ἡνιόχῳ εἰωθότι [Refs 8th c.BC+]; ὑμῖν.. τοῖς εἰώθοσιν who are used [to hear me], [Refs 5th c.BC+]; οὐκ ἐωθώς praeter morem, [Refs 5th c.BC+]; of things, τὰ ἐωθότα νοήματα [Refs 5th c.BC+]. contrary to custom, [Refs 5th c.BC+]; τὰ εἰ. ordinary things, [Refs 5th c.BC+]