διάγγελσις

From LSJ

ἵνα οὖν μηδ' ἐν τούτῳ δῷ αὐτοῖς λαβήν (Photius, Fragments on the Epistle to the Romans 483.26) → so that he doesn't give them even here a handle (= an opportunity for refutation)

Source

Spanish (DGE)

-εως, ἡ
anuncio, mensaje, noticia ἡ ἐπὶ τούτῳ δ. Cyr.Al.Ep.Fest.11.2.1.