Etymology

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de·fault
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Today it means: The condition of failing to meet an obligation. Full definition →

Middle English defaut, defaute ← Old French defaute ← Latin de-
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The story

  1. Latin · derived fromde-“away”
  2. Old French · derived fromdefaute“fault, defect, failure, culpability, lack”
  3. Middle English · inherited fromdefaut, defaute
  4. English todaydefault

From Middle English defaut, defaute, from Old French defaute (“fault, defect, failure, culpability, lack”), ultimately from Latin de- (“away”) + fallo (“deceive, cheat, escape notice of”).

Words from the same roots

Latinde- all →

deodorantdecadentdeprivedemarkde-decrepitatedefiliation

Etymology from Wiktionary, CC BY-SA 4.0.