impossible

Incapable of having existence or of occurring.

Not capable of being accomplished.

Unacceptable; intolerable.

Extremely difficult to deal with or tolerate.

Not possible; non-existent or false by necessity.

In law, in a stricter sense, prevented only by the act of God or a public enemy.

Excessively odd; not to have been imagined; such as would not have been thought possible: as, she is a most impossible person; he wears an impossible hat.

An impossibility.

Not possible; incapable of being done, of existing, etc.; unattainable in the nature of things, or by means at command; insuperably difficult under the circumstances; absurd or impracticable; not feasible.

an imaginary quantity. See Imaginary.