資料來源 : Webster's Revised Unabridged Dictionary (1913)

Incognoscible \In`cog*nos"ci*ble\, a.
   Incognizable. -- {In`cog*nos"ci*bil"i*ty}, n.

資料來源 : WordNet®

incognoscible
     adj : incapable of being perceived or known [syn: {incognizable}]