κατ-ηχέω, -ῶ

__1. to resound.

__2. to teach by word of mouth, instruct, inform (see 131. Phil. Gosp. 20, 31): Gal.6:6; with accusative of person(s), 1Co.14:19; pass. with accusative of thing(s), Luk.1:4 (ICC, in l), Act.18:25 21:24 (cf. Lk, l.with), Gal.6:6; before κ, with genitive of thing(s), Rom.2:18; περί, with genitive of person(s), Act.21:21.†

(AS)

to resound; to teach by word of mouth; instruct; inform