To Suppress

1. To put an end to, especially with force, to crush, do away with; to prohibit, subdue.
2. To restrain or repress, such as laughteror an expression.
3. (psychiatry) To exclude undesirable thoughts from one's mind.
4. To prevent publication.
5. To stop a flow or stream.
6. (US, law) To forbid the use of evidence at trial because it is improper or was improperly obtained.
7. (electronics) To reduce unwanted frequencies in a signal.
8. (obsolete) To hold in place, to keep low.