ἀέλπτως
From LSJ
ἄνω ποταμῶν ἱερῶν χωροῦσι παγαί → the springs of sacred rivers flow upward, backward to their sources flow the streams of holy rivers
Russian (Dvoretsky)
ἀέλπτως: сверх ожидания (νόστιμον φάος βλέπειν Aesch.; κραίνειν τι Eur.): ἀφράστως ἀ. τε Soph. нежданно-негаданно.
English (Woodhouse)
(see also: ἄελπτος) unexpectedly