The Collaborative International Dictionary of English v.0.48:

Squelch \Squelch\ (skw[e^]lch), v. t. [imp. & p. p. Squelched
   (skw[e^]lcht); p. pr. & vb. n. Squelching.] [Cf. Prov. E.
   quelch a blow, and quell to crush, to kill.]
   To quell; to crush; to silence or put down. [Colloq.]
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         Oh 't was your luck and mine to be squelched. --Beau. &
                                                  Fl.
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         If you deceive us you will be squelched. --Carlyle.
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