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
pĕr-ĭnungo: ĕre, v. a.,
I to anoint all over (ante-class.): tonsas recentes eodem die perinungunt vino et oleo (al. perungunt), Varr. R. R. 2, 11, 7.
pĕrĭnungō, ĕre, tr., oindre entièrement : Varro R. 2, 11, 7.