Abbott-Smith Manual Greek Lexicon
ἐπιούσιος (G1967)
2 *† ἐπιούσιος , -ον (cf. περιούσιος , [in LXX for סְגֻלָּה , De 7:6 , etc.]), found only in the phrase ἄρτος ἐ. , EV, daily ; R, mg., for the coming day : Mt 6:11 , Lk 11:3 . (Several derivations find support, each pointing to a different meaning. ἐπιοῦσα (sc. ἡμέρα ) (or, ἐπὶ τὴν ἰοῦσαν (sc. ήμέραν ), Zorell, s.v.), hence, for the morrow or for the coming day (R, mg.). ἐπί + οὐσία , hence, for subsistence, needful (Am. R, mg.); ἐπί + εἶναι in fem. ptcp. form, hence, pertaining to (the day). For renderings of versions and views of various writers, v. reff. in DB , ext. , 36 f.; DCG , ii, 58 f., 62 a ; ICC on Lk, l.c. The EV, daily , is based on the Vg. (Lk; OL, Mt, Lk, quotidianus ). "It is difficult not to think that τὸν ἐ. rests upon misunderstanding of an original Aramaic phrase, or upon a Greek corruption" ( ICC on Mt, l.c.; cf. also Cremer, 239).†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain