This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. A partial or complete reversal of a previous merger

n. The disposal of subsidiaries or divisions of a company

"Analysts were, however, downbeat on the company 's demerger, with ratings agency Standard & Poor' s saying it will likely downgrade the company 's credit and debt ratings if the demerger is completed."

demurrer    deserter   

merger    perjure