Impossible :: Impossible (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..
Possibility :: Possibility (n.) The quality or state of being possible; the power of happening, being, or existing..
Possibility :: Possibility (n.) That which is possible; a contingency; a thing or event that may not happen; a contingent interest, as in real or personal estate..
Possible :: Possible (a.) Capable of existing or occurring, or of being conceived or thought of; able to happen; capable of being done; not contrary to the nature of things; -- sometimes used to express extreme improbability; barely able to be, or to come to pass; as, possibly he is honest, as it is possible that Judas meant no wrong..
Possibly :: Possibly (adv.) In a possible manner; by possible means; especially, by extreme, remote, or improbable intervention, change, or exercise of power; by a chance; perhaps; as, possibly he may recover..