When I arrived, the other basketball club members were already dressed, so I had to hurry up.

hurry 是动词，意思是"匆忙、赶快"，表示动作急促或时间紧迫。 up 在这里是副词，与 hurry 搭配使用，表示"完全地"或"彻底地"。 hurry up 是一个常用短语动词，意思是"赶快、加快速度"，用于催促某人或自己加快行动。