Related Clues:

• Invert
• Show to be false
• Make vertical
• Stand on its head
• Make null and void
• Disrupt
• Render invalid
• Cause to topple over
• Opera by Puccini
• Stand something on its head
• Cause to topple
• Prove false, philosophically
• Deny the truth of
• Place in an erect position
• Deny, nullify