2. BAD
This is an antonym for 'good' or 'nice' and similarly is being used very widely.
For instance;
- It is a bad furniture.
Does it mean... defective? faulty? absurd?

- Bella is considered as a bad girl as she often creates problems.
Does it mean...dishonest? evil? mischievious?

Both sentences do not convey the exact sense. Nevertheless, if you rewrite the above two sentences as:

- It is a defective furniture.
- Bella is considered as a mischievious girl as she often creates problems.

Thus, the meaning becomes very much clear and accurate.