기울다

1. incline; tilt; lean
For one side to be lower or crooked in a slanted way.

2. incline; lean
For a thought or trend to be tilted to one side.

3. set
For the sun or moon to set.

4. (one's situation) become worse
For one's conditions to become worse than before.

5. be worse in comparison with another
To be worse than something when compared.