Adjective · From a compound of ἄλφα (G1) (as a negative particle) and φαίνω (G5316) [cf ἐξαίφνης (G1810)]
From a compound of G1 (as a negative particle) and G5316 (compare G1810) (meaning non-apparent); unexpected, i.e. (adverbially) suddenly:—sudden, unawares.