δεινῶς (deinos)
δεινῶς is an Ancient Greek form of δεινός, meaning “terrible, fearful; clever, formidable”. It is the adverb.
Found 282 times in the Ancient Greek texts on Socratos.
Where it is used
Diogenes Laertius, Vitae philosophorum 4.7.54: … —περίαπτα λαβεῖν ἐπείσθη καὶ μεταγινώσκειν ἐφʼ οἷς ἐπλημμέλησεν εἰς τὸ θεῖον. ἀπορίᾳ δὲ καὶ τῶν νοσοκομούντων δεινῶς διετίθετο, ἕως Ἀντίγονος αὐτῷ δύο θεράποντας ἀπέστειλε. καὶ ἠκολούθει γε αὐτὸς ἐν φορείῳ, καθά φησι Φαβωρῖνος …
Aesop, Fables 247: Λέων καὶ ἄρκτος, ὁμοῦ νεβρῷ περιτυχόντες, περὶ τούτου ἐμάχοντο. Δεινῶς οὖν ὑπʼ ἀλλήλων διατεθέντες, ὡς ἐκ τῆς πολλῆς μάχης καὶ σκοτοδινιᾶσαι, ἀπαυδήσαντες ἔκειντο. Ἀλώπηξ δὲ κύκλῳ …
All forms of δεινός (declension table)
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Liddell-Scott-Jones, A Greek-English Lexicon (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.