εὐδεινός
From LSJ
τὸ δ' ἐξαίφνης τὸ ἐν ἀναισθήτῳ χρόνῳ διὰ μικρότητα ἐκστάν → suddenly refers to what has departed from its former condition in a time imperceptible because of its smallness
English (LSJ)
ή, όν, later contr. of εὐδιεινός, Orph.H.22.5 codd.: Comp. -ότερος An.Ox.2.207; also εὐδινή (v.l. -διεινή) Str.6.3.9, cf. OGI 194.22 (Egypt, i B.C.), Hsch.
German (Pape)
[Seite 1061] Opp. H. 21, 5, l. d. S. εὐδιεινός.