ἀναγκαίως (anankaios)
ἀναγκαίως is an Ancient Greek form of ἀναγκαῖος, meaning “necessary; close (kinsman)”. It is the adverb.
Found 140 times in the Ancient Greek texts on Socratos.
Where it is used
Thucydides, History of the Peloponnesian War 2.64.2: φέρειν δὲ χρὴ τά τε δαιμόνια ἀναγκαίως τά τε ἀπὸ τῶν πολεμίων ἀνδρείως· ταῦτα γὰρ ἐν ἔθει τῇδε τῇ πόλει πρότερόν τε ἦν νῦν τε μὴ ἐν ὑμῖν κωλυθῇ.
All forms of ἀναγκαῖος (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.