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

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v. Alternative spelling of demoralize.

v. corrupt morally or by intemperance or sensuality

v. lower someone's spirits; make downhearted

"Last November it was reported that the Taliban were planning to make much more extensive use of mines, to "demoralise" Nato forces in Afghanistan."

demoralize