To repress the expression of something.
To suppress criticism, etc.
To block gene expression.
To murder.
To make (someone or something) silent.
deadly silence
The act of refraining from speaking.
The absence of any sound.
Be silent.
To sharpen (an image) by creating a blurred ("unsharp") negative as a mask, and then combining that mask with the original.
out of focus; blurry.
dulled or intentionally blunt.