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

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v. Simple past tense and past participle of evanesce.

"But now, that notion seems to have evanesced, made instantly obsolete by all the press coverage of how American public libraries have become the 'go-to' resource centers for those seeking jobs in tough times."

evanesced    evanesces    evanescing   

go away    disappear    vanish   

effervesce   

evanescent    evanescently    evanescence   

evanesced    evanescing   

disappear