verb

• (transitive, US) To halt, stop, eliminate, stamp out, or put down, often suddenly or by force.
  "Even the king's announcement could not squelch the rumors."
• (transitive, radio technology) To suppress the unwanted hiss or static between received transmissions by adjusting a threshold level for signal strength.
• (intransitive, British) To make a sucking, splashing noise as when walking on muddy ground.
  "The mud squelched underfoot; it had been raining all night."
• (intransitive, British) To walk or step through a substance such as mud.
  "The mud was thick and sticky underfoot, but we squelched through it nonetheless."

noun

• (countable) A squelching sound.
• (radio technology) The suppression of the unwanted hiss or static between received transmissions by adjusting the gain of the receiver.
• (countable, dated) A heavy blow or fall.
• (countable, music) A kind of electronic beat or sound mainly used in acid house and related music genres.
  "Through a process of experimentation the 'acid squelch' sound came forth, which was recorded and passed on to DJ Ron Hardy to play at his Warehouse club."