The story
- Latin · derived frominexpertus
- Middle French · derived frominexpert
- Middle English · inherited frominexpert, inexperte
- English todayinexpert
From Middle English inexpert, inexperte, from in- (“not”) + expert, experte, or else from Middle French inexpert or its etymon Latin inexpertus. By surface analysis, in- (“not”) + expert.
Etymology from Wiktionary, CC BY-SA 4.0.