Origin: altered < Fr salve < Sp salva, the testing of food by a taster, hence tray on which food was placed, salver < salvar, to taste, save < L salvare: see save
See salver in American Heritage Dictionary 4
Origin: Alteration of French salve
Origin: , from Spanish salva, tasting of food to detect poison, salver
Origin: , from salvar, to save, taste food to detect poison
Origin: , from Late Latin salvāre, to save; see salvage.
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