ἦχος (cf. Latinecho,vox, German sprechen, etc.; Vanicek, p. 858), ἤχου, ὁ, and (Luk_21:25 G L T Tr WH) τό ἦχος, ἐχους (cf. Winers Grammar, 65 (64); (Buttmann, 23 (20)); Delitzsch on Heb_12:19, p. 638; (or ἤχους may come from ἤχῳ, ἤχους, see especially WH's Appendix, p. 158b; Meyer on Luke as below)); 1. a sound, noise: Act_2:2; Heb_12:19; spoken of the roar of the sea's waves," Luk_21:25 G L T Tr WH. 2. rumor, report: περί τίνος, Luk_4:37.

ἦχος ēchos 3x roar, sound, noise,, Heb_12:19 ; report, Luk_4:37 ; Act_2:2 ἦχος ēchos 1x sound, noise, Luk_21:25

ἦχος , -ου , ὁ (also in late and MGr ., -εος , τό , Luk_21:25 ), [in LXX for H1995 , etc.;] 1. a noise, sound: Act_2:2 ; ἦ . θαλάσσης , Luk_21:25 ; σάλπιγγος , Heb_12:19 2. a report: seq . πεφί , Luk_4:37 .†

ἦχος [page 282] For the masc. ὁ ἦχος (as in Heb_12:19 ) cf. P Leid W x. 3 (ii/iii A.D.) ἵνα ἐκ τοῦ ἤχους (om.) ὕδατος ὁ ἦχος ἀναβῇ , and ib. x. 8 ἦχον ἐκπέμπει . The gen. ἠχοῦς from the fem. ἡ ἠχώ is, however, read by the editor in ib. V. 38 σὺ μὲν ἀπὸ ποππυσμοῦ τυνχάνεις , οὖτος δὲ ἐξ ἠχοῦς , xi. 39 καὶ ἡ γῆ ἀκούσασα ἠχοῦς , καὶ ἰδοῦσα αὐτήν , ἐθαμβήθη , and xii. 51 σὺ μὲν ἐξ ἠχοῦς εἶ , οὗτος δὲ ἐκ φθόγγου : cf. Luk_21:25 , where WH similarly accent ἠχοῦς , stating ( Notes .2 , p. 165) that the direct Bibl. evidence for the neut. τὸ ἦχος is confined to Jer_28:16 [MT Jer_51:16 ] ΰ AB, where ἦχος is apparently an accusative. For masc. nouns passing into the neut., in accordance with a not uncommon practice in Hellenistic, see Hatziakis Einl. p. 356 ff., Proleg. p. 60.

ἦχος ἦχος, ὁ, [Etym: later form of ἠχή, Theocr. , Mosch. ]

ἦχος, -ου, ὁ (also in late and MGr., -εος, τό, Luk.21:25), [in LXX for הָמוֹן, etc. ;] __1. a noise, sound: Act.2:2; ἦ. θαλάσσης, Luk.21:25; σάλπιγγος, Heb.12:19 __2. a report: before πεφί, Luk.4:37.† (AS)