In an everlasting manner; so as to be everlasting.(adverb)
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Use "everlastingly" in a sentence
"But there was no Meringe, no Biddy and Terrence and Michael on the beach; no Mister Haggin and Derby and Bob; no beach: no land with the palm-trees near and the mountains afar off everlastingly lifting their green peaks into the sky."
"They set out to everlastingly eat up some proposition but at the first sign of trouble they turn tail and stampede for the brush."
"She discovered a will of her own and wishes of her own that were not everlastingly entwined with the will and the wishes of Daisy."