ˈswēˌbak, ˈzw-, -wīˌ- also -bäk noun
( plural zwieback or zwiebacks )
Etymology: German, literally, twice baked, from zwie- (from Old High German zwi -twice) + backen to bake, from Old High German bahhan; translation of Italian biscotto biscuit — more at twi- , bake
: a usually sweetened bread enriched with eggs that is first prepared and baked and then sliced and toasted until dry and crisp