Inhabitable
Part of speech: adjective
Definition: fit to live in; habitable (see inflammable for usage note)
Livable
Part of speech: adjective
Definition: Endurable, survivable, suitable for living in, inhabitable.
Example sentence: It is nothing short of baffling to me how a city like Melbourne, where I struggle to find accessible facilities on a very regular basis, could be considered the most livable city in the world. I suppose it all depends on what makes a city 'livable' for you.