The story
- Latin · derived fromde-“away”
- Old French · derived fromdefaute“fault, defect, failure, culpability, lack”
- Middle English · inherited fromdefaut, defaute
- 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.