Etymology

disavow

D2I1S1A1V4O1W4

Today it means: To strongly and solemnly refuse to own or acknowledge; to deny responsibility for, approbation of, and the like. Full definition →

Old French desavouer
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The story

  1. Old French · derived fromdesavouer
  2. English todaydisavow

From dis- + avow, or from Old French desavouer.

Etymology from Wiktionary, CC BY-SA 4.0.