from ppl. stem of Latin conquassāre, from con- intensive + quassāre,
freq. of quatĕre to shake
1656 - Glossographia, Thomas Blount;
"Conquassate, to shake, dash, or break in peeces"
From: Plays of Three Acts;
Written for a Private Theatre.
By William Hayley, 1784
The Mausoleum: A Comedy in Rhyme,
Act II, Scene I