
1) Closelipped 2) Close mouthed 3) Deadpan 4) Expressionless 5) Guarded 6) Inarticulate 7) Incommunicado 8) Inexpressive 9) Mum 10) Noncommittal 11) Secretive 12) Taciturn 13) Tightlipped 14) Unarticulate 15) Uncommunicative 16) Unexpressive 17) Unrevealing
Found on
https://www.crosswordclues.com/clue/incommunicative

• (a.) Not communicative; not free or apt to impart to others in conversation; reserved; silent; as, the messenger was incommunicative; hence, not disposed to hold fellowship or intercourse with others; exclusive.
Found on
http://thinkexist.com/dictionary/meaning/incommunicative/
In`com·mu'ni·ca·tive adjective Not communicative; not free or apt to impart to others in conversation; reserved; silent; as, the messenger was
incommunicative ; hence, not disposed to hold fellowship or intercourse with others; exclusive. « The Chinese . . . an
incommunicative nat...
Found on
http://www.encyclo.co.uk/webster/I/34

not communicative; reserved; uncommunicative.
Found on
https://www.infoplease.com/dictionary/incommunicative
No exact match found.