Search the dictionary A Chinese word or character, or English Draw a character Search 8 entries. sìyuàn 寺院 cloister dàsìyuàn 大寺院 abbey yǐnshuǐsīyuán 饮水思源 lit. when you drink water, think of its source (idiom) yǐnshuǐsīyuán 飲水思源 lit. when you drink water, think of its source (idiom) sìyuánshù 四元数 quaternion (math.) tuìsīyuán 退思园 Retreat and Reflection Garden in Tongli, Jiangsu, one of the Classical Gardens of Suzhou, a UNESCO World Heritage Site sìyuánshù 四元數 quaternion (math.) tuìsīyuán 退思園 Retreat and Reflection Garden in Tongli, Jiangsu, one of the Classical Gardens of Suzhou, a UNESCO World Heritage Site