兌だ為い沢たくMeanings1noundui (hexagram 58 of the I Ching: lake, the joyous)Technical term from the I Ching (易経). Refers to the 58th hexagram, symbolizing a lake and the quality of joy or openness.See also: 易経易えき経きょうの第だい五ご十じゅう八はち卦かは兌だ為い沢たくと呼よばれる。The 58th hexagram of the I Ching is called dui wei ze (兌為沢).