* General opposite: Mal (meaning "bad")
* Opposite in terms of health: Mal (meaning "sick" or "ill")
* Opposite in terms of physical appearance: Feo (meaning "ugly")
* Opposite in terms of quality: Malo (meaning "bad")
* Opposite in terms of success: Mal (meaning "bad")
Example sentences:
* Bien: El tiempo está bien. (The weather is good.)
* Mal: El tiempo está mal. (The weather is bad.)
* Bien: Me siento bien. (I feel well.)
* Mal: Me siento mal. (I feel sick.)
* Bien: La comida está bien. (The food is good.)
* Malo: La comida está mala. (The food is bad.)
* Bien: La película es buena. (The movie is good.)
* Mala: La película es mala. (The movie is bad.)