An Etymological Dictionary of the German Language/Annotated/heilen
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heilen, verb, ‘to heal, cure,’ from Middle High German and Old High German heilen, ‘to heal,’ as well as Middle High German heilen, Old High German heilên, ‘to get well’; compare Anglo-Saxon hœ̂lan, English to heal (to which health is allied, Anglo-Saxon hœ̂lþ, Old High German heilida, feminine, ‘health’). —