[quash] vt [ME quashen to smash, fr. MF quasser, casser, fr. L quassare to shake violently, shatter, freq. of quatere to shake] (13c): to suppress or extinguish summarily and completely "~ a rebellion"
[2]quash vt [ME quassen, fr. MF casser, quasser to annul, fr. LL cassare, fr. L cassus void] (14c): to nullify esp. by judicial action "~ an indictment"