Dictionary entry

ἔθω

G. Abbott-Smith's A Manual Greek Lexicon of the New Testament

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.†