During the meeting, he raised his voice to emphasize his frustration with the project's progress.

raised 是动词 raise 的过去式，raise 的意思是"举起、提高"，在这里指"提高音量"。 his 是代词 he 的所有格形式，表示"他的"。 voice 的意思是"声音、嗓音"，指人说话或发声的能力。 raised his voice 是一个固定搭配，意思是"提高嗓门说话"，通常表示说话者情绪激动或强调某事。