The Yangtze River has several major tributaries, including the Han River and the Jialing River.

tributaries 是名词 tributary 的复数形式。tributary 由词根 tribute（贡品、贡献）和后缀 -ary（与...相关的）组成，原指"进贡的、附属的"，在河流系统中指"支流"，即汇入主河的小河流。