From a compound of G1 (as a negative particle) and G5316 (compare {G1810}) (meaning non apparent); {unexpected} that {is} (adverbially) suddenly: - {sudden} unawares.
Rev 13:10He that leadeth into captivityG161 shall go into captivityG161: he that killeth with the sword must be killed with the sword. Here is the patience and the faith of the saints.