quash 1 
(kwŏsh)
(kwŏsh)tr.v. quashed, quash·ing, quash·es
To annul or put an end to (a court order, indictment, or court proceedings).
[Middle English quassen, from Anglo-Norman casser, quasser, from Medieval Latin quassāre, alteration (influenced by quassāre, to crush, shatter) of cassāre, from Latin cassus, empty, void; see kes- in the Appendix of Indo-European roots.]