Undiscovered synonyms

That would be reason enough why the bones went undiscovered for four decades.

These assertions, and the total inadequacy of the pharmacology of colchicum, as above detailed, to explain its specific therapeutic property, show that the secret of colchicum is as yet undiscovered.

Favoured with a dark and foggy night the party of 150 men and a guide reached the first ledge of rock undiscovered.

While still an undergraduate he happened to read of certain unexplained irregularities in the motion of the planet Uranus, and determined to investigate them as soon as possible, with a view to ascertaining whether they might not be due to the action of a remote undiscovered planet.

Some of these are rubbish but there are also some undiscovered gems among them.