Upper trigram
☴
Wind · Xun
Gentle penetration.
FamilyEldest daughter
ElementWood
Hexagram 57 of 64
☴☴ The Gentle
Penetrating influence, repeated.
Lower trigram
☴
Wind · Xun
Gentle penetration.
FamilyEldest daughter
ElementWood
The image
Wind above, Wind below.
Wind over Wind: gentle penetration meeting gentle penetration.
That combination is the whole meaning of hexagram 57. 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.