Dui is also one of the eight doubled trigrams. Two lakes rest on top of each other. This represents the youngest daughter in a family, it also symbolizes a joyous Lake. With the two strong lines of the trigram and one yielding dark principle on top, Dui symbolizes true joy that is strong, firm, and gently radiates from within.
With this hexagram, you should join forces with friends and the collaborative effort and perseverance will prevail.