ὄντα
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)
τά, neut. pl. part. of εἰμί
A (sum), the things which actually exist, the present, opp. the past and future, E.Hel.14 ; butalso, 2 reality, truth, opp. that which is not, Pl.Sph.263d ; actual objects, σκιὰς τῶν ὄντων Id.R.532c, etc. ; v. εἰμί. II that which one has, property, fortune (cf. οὐσία), D.18.102.
German (Pape)
[Seite 350] τά, part. praes. von εἰμί, w. m. s., das, was ist, sowohl das Gegenwärtige im Ggstz des Vergangenen u. Zukünftigen, als auch das, was wirklich ist, im Ggstz des Gedachten, das Wirkliche; auch das Vermögen, Hab und Gut, z. B. Dem. 18, 102.