To put an end to, especially with force, to crush, do away with; to prohibit, subdue.
To restrain or repress, such as laughter or an expression.
To exclude undesirable thoughts from one's mind.
To prevent publication.
To stop a flow or stream.
To forbid the use of evidence at trial because it is improper or was improperly obtained.
To reduce unwanted frequencies in a signal.
To hold in place, to keep low.