The student threw his homework on the ground and looked at the teacher rebelliously.

rebelliously 是形容词 rebellious 的副词形式，由 rebel（反叛）加上形容词后缀 -ious 构成 rebellious（叛逆的），再加上副词后缀 -ly 构成 rebelliously（叛逆地）。这个词描述一种反抗权威或规则的态度或行为方式。