Home › Words › U › unpossibilityunpossibilityunpossibility means impossibility.EtymologyFrom un- + possibility.nounImpossibility.e.g.“‘It would be a matter of utter unpossibility,’ replied Legs, […] ‘to stow away in my hold even one-fourth part of that same liquor which your majesty has just mentioned.’” — 1835, Edgar Allan Poe, King Pest:Definitions & examples from Wiktionary (CC BY-SA 3.0).