Webster's Revised Unabridged Dictionary · 1913

Quash

Quash , noun

Same as Squash.

Quash , transitive verb

[Old French quasser, French casser, from Latin cassare to annihilate, annul, from cassus empty, vain, of uncertain origin. The word has been confused with Latin quassare to shake, French casser to break, which is probably of different origin. Compare Cashier, transitive verb]

(Law) To abate, annul, overthrow, or make void; as, to quash an indictment. — Blackstone

Quash , transitive verb

[Old French quasser, French casser, from Latin quassare to shake, shatter, shiver, v. intens. from quatere, quassum, to shake, shatter. Compare Concussion, Discuss, Rescue, and also Quash to annul.]

1.
To beat down, or beat in pieces; to dash forcibly; to crush.
The whales Against sharp rocks, like reeling vessels, quashed, Though huge as mountains, are in pieces dashed. — Waller
2.
To crush; to subdue; to suppress or extinguish summarily and completely; as, to quash a rebellion.
Contrition is apt to quash or allay all worldly grief. — Barrow

Quash , intransitive verb

To be shaken, or dashed about, with noise.