ἐξαπίναιος

α, ον, ος, ον, Adv.
A. = ἐξαιφνίδιος, Hp. Acut. 28, X. Hier. 10.6, Plb. 25.2.1, Call. Jov. 50, Ruf. ap. Orib. 6.38.25. Adv. ‐ως Hp. Art. 43, Th. 3.3, al.
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
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