Unpossibility
Origin
From - + possibility.
Full definition of unpossibility
Noun
unpossibility
(countable and uncountable; plural unpossibilitys)- (now rare) Impossibility.
- 1835, Edgar Allan Poe, ‘King Pest’:‘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.’