impossible

adj. 1 not possible. 2 colloq. Not easy, convenient, or believable. 3 colloq. (esp. Of a person) outrageous, intolerable.  impossibility n. (pl. -ies). Impossibly adv.

a. 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.