Wicked

The adjective "wicked" stands out among other options:

- gloomy;
- depressed;
- miserable;
- forlorn.

First of all, it is not a synonym for the word "sad".
Second, it is a tricky adjective since in American and British English it has got different meanings. 
This is what you will learn from my favourite dictionary:

1 behaving in a way that is morally wrong [= evil]:

- the wicked stepmother in 'Hansel and Gretel'

2 informal behaving badly in a way that is amusing:

- Carl had a wicked grin on his face as he crept up behind Ellen.

- Tara hasn't lost her wicked sense of humour.

3 spoken informal very good:

- That's a wicked bike!

 

Wicked word, is it not?