Demist is a verb that means to clear or remove the mist or fog from a surface. There are several synonyms that can be used to describe this action, including defog, dehumidify, clear, unfog, and wipe down. These words all suggest the process of eliminating moisture or condensation from glass or other surfaces, making it easier to see and improving the clarity of visibility. In everyday life, this might involve using a towel to wipe down a bathroom mirror after a hot shower or using your car's demister to remove steam and fog from the windscreen during a winter morning commute.