Synonyms for quash

Verb

1. repress, quash, keep down, subdue, subjugate, reduce, oppress, suppress, crush

usage: 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"

2. invalidate, annul, quash, void, avoid, nullify, cancel, strike down

usage: declare invalid; "The contract was annulled"; "void a plea"