immunosuppressive

/IH1 M Y UW0 N OW0 S AH0 P R EH1 S IH0 V/
noun
  1. 1

    An agent which is capable of immunosuppression.

adjective
  1. 1

    (pharmaceutical effect) Having the capability to suppress the immune system, capable of immunosuppression.

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