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
impărĭter: adv., v. impar.
impărĭtĕr¹⁶ (impar), inégalement : Hor. P. 75.
impariter, Adv. (impar), ungleich, Hor. de art. poët. 75.