Wiktionary
a. 1 Not described 2 Not previously known to science
Usage examples of "undescribed".
As for myself, I should scarcely know where to begin if I set to work to describe my doings, so I had best leave them undescribed, and content myself with saying that, on the whole, I am getting on very well in my curious position of King-Consort -- better, indeed, than I had any right to expect.
Why don you think what you might do with those three undescribed characters, and what you would want subliminally, before you let your instinct tell you what you can and can do.
Something holy that rubs off from that undescribed demon called God, Hero Tohm.
It is that in all the illustrations, from the simplicity of Athens, through the artificiality of Louis XIV and the monstrosities of Elizabeth, down to the undescribed modistic inventions of the first McKinley, there is discoverable a radical and primitive law of beauty.
Jasper examines the part of the precincts in the shadow of the Cathedral, because he wishes to assure himself that it is lonely enough for his later undescribed but easily guessed proceedings in this night of mystery.
Andrew Jackson and Jean Lafitte had gone up it to plan the defense of New Orleans against the British in 1814, and Ben Butler for carefully undescribed purposes half a century later.