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
P. and V. εὐμενής,. πρᾶος, φιλάνθρωπος, φιλόφρων (Xen.),. Ar. and P. εὔκολος, P. ῥᾴδιος, V. πρευμενής.