In′com‐mu″ni‐ca‐tive (?), 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.
The Chinese... an incommunicative nation. C. Buchanan.
— In′com‐mu″ni‐ca‐tive‐ly, adv. — In′com‐mu″ni‐ca‐tive‐ness, n.Lamb.
His usual incommunicativeness. G. Eliot.