- not discoverable.
Origin of indiscoverable
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for indiscoverable
Some days passed and a rumour went about the town, in its origin as indiscoverable as the birthplace of the winds.Doom Castle
Comets, with tails like O'Connell, are so common as to lose attraction, and blaze by weekly into indiscoverable realms.