uncommunicative

/AH0 N K AH0 M Y UW1 N AH0 K AH0 T IH0 V/
adjective
  1. 1

    Tending not to communicate; not communicating.

    โ€œHe asked and asked, but she remained silent and uncommunicative.โ€

Source: https://en.wiktionary.org/wiki/uncommunicative