不可能

Adjective

 * 1) impossible

Etymology
Ultimately from compound.

First cited in 's works in 1905. The positive term isn't cited until a few years later in 1909. However, the related term is cited earlier in 1881, in the  compiled by,  suggesting that the terms  and  may have been in use earlier than first cited.

Adjective

 * 1)  impossible

Noun

 * 1) impossibility, that which is impossible