Webster’s Revised Unabridged Dictionary · 1913
Impossible
Im·pos′si·ble (ĭm·pŏs′sĭ·b'l), a. [F., fr. L. impossibilis; pref. im- not + possibilis possible. See Possible.] 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.
With men this is impossible; but with God all things are possible. Matt. xix. 26.
Without faith it is impossible to please him. Heb. xi. 6.
Impossible quantity (Math.), an imaginary quantity. See Imaginary.
Syn. — See Impracticable.
Im·pos′si·ble, n. An impossibility. [Obs.]
"Madam," quoth he, "this were an impossible!" Chaucer.