The Ying River is the largest tributary of the Huai River.
Tips
history
颍 is not a general word; it is a fixed river and place name. It names the 颍河 in Henan and Anhui and survives in old place names such as 颍川. The head radical 页 is the index; 水 inside marks it as a watercourse.
mistakes
Do not confuse 颍 (river name, with 水 inside) with the look-alike 颖 (as in 聪颖, 'clever', with 禾 inside). They share a sound but are different characters.