Upper trigram
☱
Lake · Dui
Joy and openness.
FamilyYoungest daughter
ElementMetal
Hexagram 58 of 64
Open, shared pleasure.
Upper trigram
Joy and openness.
Lower trigram
Joy and openness.
Lake above, Lake below.
Lake over Lake: joy and openness meeting joy and openness.
That combination is the whole meaning of hexagram 58. Nothing about it is arbitrary — change either trigram and you get a different hexagram with a different reading, which is why the 64 form a system rather than a list.