неожиданно
From LSJ
Περὶ τοῦ ἐπέκεινα τοῦ νοῦ κατὰ μὲν νόησιν πολλὰ λέγεται, θεωρεῖται δὲ ἀνοησίᾳ κρείττονι νοήσεως → On the subject of that which is beyond intellect, many statements are made on the basis of intellection, but it may be immediately cognised only by means of a non-intellection superior to intellection
Russian > Greek
ἄφνω, ἐξαίφνης, ἀνυπονοήτως, ἀπρονοήτως, ἐξαπιναίως, ἀπροόπτως, παραλόγως, ἀνελπίστως, ἀδόκητα, ἀδοκήτως, ἀνωϊστί, ἀφράστως, ἀμαθῶς, ἀπροσδοκήτως, παραβόλως