Three-line trigram
Lake Trigram
兌 · Dui
Lake is associated here with joyful exchange and the image of lake. Its bottom-to-top binary line pattern is 110 where 1 represents yang and 0 represents yin.
Lake as a lower or upper trigram
As the lower trigram, Lake describes the inner or initiating three lines of a hexagram. As the upper trigram, it forms the outer or completing three lines. The meaning of a full hexagram comes from the complete six-line figure and textual tradition, not from simply adding two trigram keywords together.