Synonym: annul, avoid, invalidate, keep down, nullify, reduce, repress, subdue, subjugate, void. Similar words: squashed, quasi, persuasion, persuasive, persuasively, ash, ashes, dash. Meaning: [kwɑʃ /kwɒʃ] 
v. 1. put down by force or intimidation 2. declare invalid.
v. 1. put down by force or intimidation 2. declare invalid. 31. The authorities acted quickly to quash the student rebellion, sending in tanks to cow the demonstrators.
32. Since I knew Gauleiter Sturtz of Brandenburg quite well , I was able to quash the affair.