Impossibility
IMPOSSIBIL'ITY, noun [from impossible.]
1. That which cannot be; the state of being not possible to exist. That a thing should be and not be at the same time, is an impossibility
2. Impracticability; the state or quality of being not feasible or possible to be done. That a man by his own strength should lift a ship of the line, is to him an impossibility as the means are inadequate to the end. [See Impossible.]