impossibility
US
UK impossibility n: (inability to happen or be true)
SC 不可能（发生） bù kě néng fā shēng
SC 不可能性 bù kě néng fā shēng，bù kě néng xìng
The impossibility of your story makes me think you're lying.
impossibility n: ([sth] impossible)
SC 不可能的事 bù kě néng de shì
Pigs flying is an impossibility.