源

源 [yuán] 名

1. ■ （水流起头的地方） source (of a river); fountainhead:

饮水思源 when drinking water think of its source; remember where one's happiness comes from;

木有本， 水有源。 Every tree has its roots and every river has its source.

2. ■ （来源） source; cause:

病源 cause of a disease;

财源 source of income;

货源 source [supply] of goods

3. ■ （姓氏） a surname:

源乾曜 Yuan Qianyao