uncommunicative
['incommunicative', 'blank ', 'vacuous ', 'close ', 'closelipped ', 'closemouthed ', 'secretive ', 'tightlipped ', 'deadpan ', 'expressionless ', 'impassive ', 'pokerfaced ', 'unexpressive ', 'incommunicado ', 'inexpressive ', 'mum ', 'silent ', 'unpronounceable ', 'unutterable ', 'inarticulate ', 'unarticulate ', 'taciturn ', 'communicative ']