Squelched

To halt, stop, eliminate, stamp out, or put down, often suddenly or by force

"Even the king’s announcement could not squelch the rumors."

(radio technology) to suppress the unwanted hiss or static between received transmissions by adjusting a threshold level for signal strength, below which the signal is suppressed by applying a gain of zero, and above which a positive (and linear from zero) gain is applied.

To make a sucking, splashing noise as when walking on muddy ground

"The mud squelched underfoot; it had been raining all night."

To walk or step through a substance such as mud

"The mud was thick and sticky underfoot, but we squelched through it nonetheless."

Having been squelched.