Related Clues:

• Cancel out
• Abolish
• Undo ''I do''
• Untie the knot, say
• Neutralize
• Abrogate
• Negate
• Make invalid
• Void a marriage
• Void, as a marriage certificate
• Declare legally void
• Render ineffective
• Make disappear
• Declare void
• Undo, in a way