sup·press / səˈpres/ • v. [tr.] forcibly put an end to: the uprising was savagely suppressed. ∎  prevent the development, action, or expression of (a feeling, impulse, idea, etc.); restrain: she could not suppress a rising panic. ∎  prevent the dissemination of (information): the report had been suppressed. ∎  prevent or inhibit (a process or reaction): use of the drug suppressed the immune response. ∎  partly or wholly eliminate (electrical interference). ∎  Psychoanalysis consciously inhibit (an unpleasant idea or memory) to avoid considering it.DERIVATIVES: sup·press·i·ble adj.sup·pres·sive / -siv/ adj.sup·pres·sor / -sər/ n.

suppress put down by force or authority XIV; subdue (feelings, etc.) XVI; keep secret. f. suppress-, pp. stem of L. supprimere, f. SUB- + premere PRESS.
So suppression XVI — L. suppressive XVIII.

suppress To prevent the output or sensing of selected data or signals. See also zero suppression.

SUPPRESS

To stop something or someone; to prevent, prohibit, or subdue.

To suppress evidence is to keep it from being admitted at trial by showing either that it was illegally obtained or that it is irrelevant.