The Collaborative International Dictionary
Incognoscible
Incognoscible \In`cog*nos"ci*ble\, a. Incognizable. -- In`cog*nos"ci*bil"i*ty, n.
Wiktionary
incognoscible
a. (context rare dated English) Not capable of being known; incomprehensible.
WordNet
incognoscible
adj. incapable of being perceived or known [syn: incognizable]