The Collaborative International Dictionary
Incommunicability
Incommunicability \In`com*mu`ni*ca*bil"i*ty\, n. [Cf. F. incommunicabilit['e].] The quality or state of being incommunicable, or incapable of being imparted.
Douglas Harper's Etymology Dictionary
incommunicability
1630s; see incommunicable + -ity.
Wiktionary
incommunicability
n. The quality or state of being incommunicable.