Quick Definition
ἔα Ij. an interjection: ho!
Strong's Definition
apparent imperative of 1439; properly, let it be, i.e. (as interjection) aha!
KJV Usage: let alone
UBS Dictionary of the Greek New Testament
part.
88.191 · Moral and Ethical Qualities and Related Behavior · Anger, Be Indignant With
ah an exclamatory particle indicating surprise, indignation, or anger If another language does not have a fully satisfactory particle expressing surprise, indignation, or anger, it is probably best to leave this particle untranslated, as, for example, in a number of translations into English which make no attempt to introduce a corresponding emotive particle.
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Thayer's Greek Lexicon
ἔα, an interjection expressive of indignation, or of wonder mixed with fear, (derived apparently from the impv. pres. of the verb ἐᾶν (acc. to others a natural, instinctive, sound]), freq. in the Attic poets, rare in prose writ. (as Plat. Prot. p. 314 d.), ha! ah!: Mk. i. 24 RG; Lk. iv. 34; ef. Fritzsche on Mk. p. 32 sq.
Mounce Concise Greek Dictionary
ἔα ea 1x
Ha! an expression of surprise or displeasure, Lk. 4:34*
Abbott-Smith Greek Lexicon
ἔα, interj., expressing surprise, indignation, fear (in cl. chiefly in poët.), ah! ha!: Lk 4:34.†
Liddell-Scott-Jones — Greek-English Lexicon
ἔα (ea) — ha!/aha!. ἔᾱ, Epic dialect and Ionic dialect for ἦν, imperfect of εἰμί. ἔᾱγα, ἐάγην [ᾰ], see at {ἄγνυμι}. ἔακεν· ἀλγεῖ, [Refs 5th c.AD+] ἕᾱδα, participle ἑᾱδώς, see at {ἁνδάνω}. ἐάλη, see at {εἴλω}. ἐαλόν· λυπηρόν, λυτήριον, [Refs 5th c.AD+] ἑάλωκα, ἑαλώκειν, see at {ἁλίσκομαι}.