The team performed dismally this season, losing most of their games.

dismally 是形容词 dismal 的副词形式，dismal 的意思是"阴沉的、凄凉的、糟糕的"，形容非常不理想或令人失望的状况。 dismally 作为副词修饰动词 perform，表示"表现得很糟糕"。