Impossibility (noun)

1. Something that cannot be done or achieved.
2. The state of being impossible.

Origin:

The word "impossibility" is derived from the latin word "impossibilis" meaning not possible and the suffix "-ity" indicating a state or condition. it is used to describe something that cannot be done or achieved.

Examples:

1. He believed that traveling to the moon was an impossibility.
2. The task was deemed an impossibility by the experts.
3. The idea of a perpetual motion machine is an impossibility according to the laws of physics.
4. It is an impossibility to please everyone.
5. The impossibility of time travel is a common topic in science fiction.