General opposites:
* Inhabitable: This directly negates the meaning of "habitable" and means "not suitable for living".
* Uninhabitable: Similar to "inhabitable", this means "not suitable for living".
* Unlivable: This implies that a place is too harsh or dangerous for humans to live in.
* Desolate: This describes a place that is barren, empty, and lacking in life.
* Barren: This refers to a place that is unproductive or unable to support life.
Specific opposites:
* Toxic: If referring to a habitable environment being polluted, the opposite would be "clean" or "non-toxic".
* Hostile: If referring to a habitable environment being dangerous, the opposite would be "safe" or "welcoming".
The best opposite word depends on the specific situation and what aspect of "habitable" you want to contradict.