Japanese by Example
Learning through examples in manga

Not understanding at all with 全然〜ない

ご注文はうさぎですか? » Volume 1 » Page 106

During an underwater-breath-holding contest, Cocoa begins a game of charades. Syaro doesn’t understand at all what the gestures are supposed to mean.

シャロ:
全然(ぜんぜん)わからない