Thayer's
STRONGS NT 1436: ἔαἔα, an interjection expressive of indignation, or of wonder mixed with fear (derived apparently from the imperative present of the verb
ἐάν (according to others a natural instinctive, sound)), frequent in the Attic poets, rare in prose writings (as
Plato, Prot., p. 314 d.), "Ha! Ah!":
Mark 1:24 R G;
Luke 4:34; cf. Fritzsche on Mark, p. 32f.
