Please handle these documents expeditiously as the boss needs them tomorrow.

expeditiously 是形容词 expeditious 的副词形式，由词根 expedite（迅速处理）加上形容词后缀 -ious 构成形容词，再加副词后缀 -ly 构成。expeditiously 意思是"迅速地、高效地"，强调快速且有条理地完成某事。