Impossible (adjective)

1. Not able to be done, achieved, or accomplished.
2. Not able to happen or be true.

Origin:

Late 16th century: from french, or from latin impossibilis, from in- "not" + possibilis (see possible).

Examples:

1. It is impossible to predict the future.
2. The task seemed impossible, but she succeeded.
3. The odds of winning the lottery are next to impossible.
4. It is impossible for a human to fly without the aid of technology.
5. He claimed it was impossible to fix the problem, but she proved him wrong.