Hexagram 47 of 64

☱☵ Oppression

Exhaustion and confinement.

Upper trigram

Lake · Dui

Joy and openness.

FamilyYoungest daughter
ElementMetal

Lower trigram

Water · Kan

Danger and depth.

FamilyMiddle son
ElementWater

The image

Lake above, Water below.

Lake over Water: joy and openness meeting danger and depth.

That combination is the whole meaning of hexagram 47. 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.