noncommunicative
adjective
non·com·mu·ni·ca·tive ˌnän-kə-ˈmyü-nə-ˌkā-tiv 
-ni-kə-tiv
: not communicative:
a
: unable or not tending to communicate information, thoughts, or feelings
a noncommunicative patient
a shy, noncommunicative [=uncommunicative] person
b
: not of or relating to communication
noncommunicative gestures
Word History
First Known Use
1847, in the meaning defined above