#1 quash v. [repress, keep down, subdue, subjugate, reduce] put down by force or intimidation; "The government quashes any attempt of an uprising"; "China keeps down her dissidents very efficiently"; "The rich landowners subjugated the peasants working the land". wn
#2 quash v. [invalidate, annul, void, avoid, nullify] declare invalid; "The contract was annulled"; "void a plea". wn
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