squelch

(transitive, US) To halt, stop, eliminate, stamp out, or put down, often suddenly or by force.

(transitive, radio technology) To suppress the unwanted hiss or static between received transmissions by adjusting a threshold level for signal strength.

(intransitive, Britain) To make a sucking, splashing noise as when walking on muddy ground.

(intransitive, Britain) To walk or step through a substance such as mud.