Upper trigram
☵
Water · Kan
Danger and depth.
FamilyMiddle son
ElementWater
Hexagram 5 of 64
☵☰ Waiting
The situation is not ready; patience is the action.
Lower trigram
☰
Heaven · Qian
Creative force.
FamilyFather
ElementMetal
The image
Water above, Heaven below.
Water over Heaven: danger and depth meeting creative force.
That combination is the whole meaning of hexagram 5. 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.