Opposite to 杲, the character we will examine today is 杳: the Sun (日) falls under the tree (木), which is to represent following scene:
|Sunsets under a tree - 杳|
Now it is obvious to guess its meaning. 杳 should be related to dim, darkness and etc at sunsets.
杳 means Dim, or Dark.
And 杳 is eventually extended to mean Disappear.
As usual we will examine its evolution history to understand it better: (Image taken from http://vividict.com)
|Learn one Chinese Character a day - 杳|
And let us enjoy a Chinese calligraphy with 杳 inside: