v. refute, deny, contradict, belie, confound, demolish, disclaim, gainsay, lie down, scotch

or -us| dementissimus -a -um ADJ
out of one's mind/senses; demented| mad| wild| raving; reckless| foolish

demens, dementis, dementium
adj. out of one's mind/senses; demented, mad, wild, raving; reckless, foolish; 

demo, demere, dempsi, demptus
v. take/cut away/off, remove, withdraw; subtract; take away from; 

out of one's mind
  

mad