An Etymological Dictionary of the German Language/Annotated/necken
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necken, verb, ‘to tease, banter,’ from Middle High German (Middle German) nęcken, ‘to excite the appetite,’ to which is allied Middle High German (Middle German) nachaft, ‘malicious, crafty,’ nac-heit, ‘malice, cunning’; not found in Old High German. Of obscure origin. See Schabernack.