Explanation:

- The word "sordid" means dirty, squalid, or morally degraded.

- Option 1: Honourable

- Means ethical, principled, or deserving respect.

- It is the opposite of morally degraded.

- Correct antonym.

- Option 2: Censurable

- Means deserving of blame or criticism.

- It's not directly opposing "sordid."

- Option 3: Shameful

- Means causing one to feel disgrace or guilt.

- Synonymous with "sordid."

- Option 4: Excellent

- Means outstanding or of high quality.

- Not directly opposing the moral context of "sordid."