If "fine" means good or excellent:
* Bad
* Poor
* Terrible
* Awful
* Inferior
* Substandard
If "fine" means thin or delicate:
* Thick
* Coarse
* Rough
* Heavy
* Sturdy
If "fine" means well or healthy:
* Sick
* Ill
* Unwell
* Weak
* Ailing
If "fine" means a penalty or payment:
* Free
* Exempted
* Waived
If "fine" means to refine or make pure:
* Crude
* Unrefined
* Impure
* Raw
Please provide more context so I can give you the most accurate antonym!