One of the mysteries of the English language finally explained.
Early 19th century; earliest use found in Henry Crabb Robinson (1775–1867), diarist and journalist. From post-classical Latin advocatus diaboli from classical Latin advocātus + diabolī, genitive of diabolus.
advocatus diaboli/advəˌkɑːtəs dɪˈabəli//advəʊˌkeɪtəs dʌɪˈabəlʌɪ/
In this article we explore how to impress employers with a spot-on CV.